Just living is not enough. One must have sunshine, freedom, and a little flower. Freedom stands for something greater than just the right to act however I choose—it also stands for securing to everyone an equal opportunity for life, liberty, and the pursuit of happiness. Just living is not enough.
Securing freedom from fear and freedom from want is very likely to entail some collective, organized action. That kind of activity is often carried out most effectively and efficiently (although, admittedly, not perfectly) by the government. If we want to live in a society where freedoms are protected and where the opportunity to exercise freedom is assured, we have to rely on some form of governance. So far, liberal representative democracy seems to do the best job of it.