It's debatable that we're a democracy.

I would bet that in aggregate, more than half the taxes you pay go to your state, or some local polity smaller than state. Local political entities (county, city, town) are absolutely democracies and also have the maximum amount of actual impact on your life. The federal government is mostly irrelevant.

By avoiding paying taxes, you first and foremost damage the community you live in.

Fun fact: precisely nobody who voted to elect the congresspeople who voted for the income tax amendment are alive today.

It’s a big stretch to assume that the current tax regime is related in any way to the will of the group of people who are currently subjected to it.