Taxes, tariffs, and fees, sure.

But even that's just an end-run around publicly staffed and administered enterprises. Why do you even need a private middleman to begin with? Taxation is a means of reorganizing currency, sure. But a nation's real material wealth is in its sovereignty, its industry, and its natural resources.

Rather than letting a handful of grifters and gatekeepers rent-seek off the public, then skimming a vig off the top, we could abolish the landlord class entirely and manage the productive forces democratically.