The government does not exist to make you happy. It may exist to serve you in the highly general sense, but this is far and away from obey your every whim. Similarly, you don't get to just stop paying taxes when you disagree with the purpose they are being used for, or else society wouldn't function at all. The relationship between the government and the citizens has to be mutual, it cannot just be one making demands of the other. As it stands American democracy is already an increasingly one way street, where the citizens elect politicians who obstruct the process of government and the passing of legislature to fulfill the desires of their special interests.
In other words, there is a certain extent to which yes, government does know what's best for you. It exists to serve your interests, but not your whims.
Ahhh, but what you don't understand is that the universe exists, even god exists, to serve his every whim.