The lovers of liberty need not grant the skeptics their premise. In fact, a desire for political liberty is not a call for a specific morality of any kind. The critics who suggest otherwise confuse cause with effect. That is, first we must establish a free society in which no one may initiate coercion of any stripe. It is unlikely we will all agree as to its nature, but given the ideas outlined above, such disagreements will be of no concern to government.
Political freedom is a tool.
What we do with it is up to us. With liberty, we have the opportunity to build good and decent lives in accordance with sound moral principles. We may succeed or we may fail. There is no alternative.