Talk about rejecting nuance, but now the state is "all powerful" because you can't transact privately.
Yes, the state has control of finance and transactions. It always does.
Democracies are build on principles like Popular sovereignty, political equality, or the rule of law.
Private transactions or tax-free property isn't a democratic feature. Yes, it's that obvious.
Even if you accept those premises, reasonable people would expect limits on the power of the state to infringe upon property rights, even when backed by a popular majority. Furthermore, the principle of individual self-ownership is a key starting point for modern, liberal ideas of law. Of course you are free to reject those premises, but I would characterize that as authoritarian rather than obvious.