Divide a government into shares like a business.
Distribute 80% of those shares to the citizens.
Put the rest 20% on sale on a stock exchange.
Revenue is taxes collected.
Changes are done with pure democracy. Votes are public. But votes can also be delegated to others.

Results?

Appropriate taxes.
Increased welfare.
Better quality education. Abolish student fees. Send lots of money to the best schools but make them compete as much as possible.
Better healthcare. Current one is toxic (meaning in very capitalistic countries; others are inefficient - both would be solved).