Freedom of expression is necessary, among other things, to foster political accountability in a democracy. On that much we can surely all agree. But what follows from the link between the freedom of political discussion and our interest in holding our elected representatives to account? Specifically, when it comes to regulating money in politics, should a healthy concern with maintaining accountability cause us to favour more restrictions, or fewer? The answer to that question is, to say the least, not obvious, as a comparison between two judicial opinions linking democratic accountability and freedom of expression but coming to opposite conclusion shows.
In McCutcheon v Federal Election Commission, 134 S Ct 1434 (2014), the majority of the U.S. Supreme Court struck down limits on the total amount of money an individual is allowed to donate to candidates at an election. (The limit on the amount that can be given to an individual candidate was not at issue.) In dissent, Justice Breyer drew on the value of accountability to justify the limitation of the role of money in politics. He noted that “political communication seeks to secure government action. A politically oriented ‘marketplace of ideas’ seeks to form a public opinion that can and will influence elected representatives.” (1467) The protection of the freedom of expression, he continued, “advances not only the individual’s right to engage in political speech, but also the public’s interest in preserving a democratic order in which collective speech matters.” (1467; emphasis in the original) According to Justice Breyer, the undue influence of substantial pecuniary contributions to politicians, which he characterized as
[c]orruption breaks the constitutionally necessary “chain of communication” between the people and their representatives. It derails the essential speech-to-government-action tie. Where enough money calls the tune, the general public will not be heard. Insofar as corruption cuts the link between political thought and political action, a free marketplace of political ideas loses its point. (1467)
In other words, to keep politicians accountable to the voters, it is necessary to limit the influence of money on them, and in this particular case to uphold the constitutionality of limits on donations.
Compare this with the opinion of Australian High Court’s Chief Justice Mason in the case of Australian Capital Television Pty Ltd v Commonwealth, (1992) 177 CLR 106. At issue were provisions eliminating the ability of both political parties and candidates and of “third parties” to pay for electoral advertisements in broadcast media. (Parties represented in Parliament were given some free time for their advertisements.) Chief Justice Mason also extolled the virtues of democratic accountability and emphasized the link between the actions of the governors and the opinions of the governed:
the representatives who are members of Parliament and Ministers of State are not only chosen by the people but exercise their legislative and executive powers as representatives of the people. And in the exercise of those powers the representatives of necessity are accountable to the people for what they do and have a responsibility to take account of the views of the people on whose behalf they act. Freedom of communication as an indispensable element in representative government. 
Democratic accountability thus required that the freedom of expression be protected (even in the absence of an explicit guarantee in the constitutional text):
Indispensable to that accountability and that responsibility is freedom of communication, at least in relation to public affairs and political discussion. … Only by exercising that freedom can the citizen criticize government decisions and actions, seek to bring about change, call for action where none has been taken and in this way influence the elected representatives. … Absent such a freedom of communication, representative government would fail to achieve its purpose, namely, government by the people through their elected representatives; government would cease to be responsive to the needs and wishes of the people and, in that sense, would cease to be truly representative. 
So far, so similar to Justice Breyer. But from this, Chief Justice Mason went on to reason that the restrictions on electoral advertising at issue could not stand, because they were incompatible with the freedom of political communication, and thus undermined democratic accountability. More money in politics, not less, was the way to keep politicians accountable to the people.
Now, contrasting these two opinions in this way is oversimplifying things. The issues in McCutcheon and in Australian Capital Television were somewhat different. The former concerned the giving of money to politicians; the letter, spending both by politicians and by civil society actors. Although both come within the general category of “money in politics” concerns, it is possible to think that one but not the other can be strictly regulated. Besides, to some extent at least, both McCutcheon and Australian Capital Television were about means, not just ends. It is possible that, confronted with different regulations, both Justice Breyer and Chief Justice Mason would have reached different conclusions by reasoning from the same values.
That said, we know that the same faction of the U.S. Supreme Court that dissented in McCutcheon was also favourable to restrictions on electoral speech by (at least some) members of the civil society in Citizens United v Federal Election Commission, 558 US 310 (2010). And while there might be a point at which Justice Breyer would have balked at the limitation of permissible financial contributions to politicians, it is not clear where that point lies. Conversely, although Chief Justice Mason suggested that a less restrictive set of regulations might have been compatible with the freedom of political communication, existing regulatory schemes, such as Canada’s or New Zealand’s, would likely not have made the cut, and I struggle to imagine one that would. The disagreement is not only, and I suspect not mainly, about means. It is driven to a substantial extent by conflicting interpretations of the value of accountability.
I’ll leave to another post (maybe, sometime) a discussion of who, if anyone, of Justice Breyer and Chief Justice Mason is right. My point here is rather that appeals to values, and even to generally accepted truths (such as the importance of free political expression to democratic accountability) are unlikely to settle the difficult disputes that arise in the law of democracy. The values may be shared at a sufficiently high level of abstraction, yet understood so differently as to lead those who hold them to starkly different conclusions.