Make it transparent. Redesign the public machinery so that it rewards reporting on corruption and nepotism. Make it a career move to oust bad apples. He who reports his bosses corruption, gets his job.
Same for monopolistic practices. Report them, become CEO of the busted off Company part. We can engineer processes for anything, we can design them to produce lean, mean state-machines grinding the bad actors inside to dust.
You could create a one-purpose-party, which has a updated "constitution" as proposal with a feature freeze on the proposal, that fixes the flaws. Then gather the votes and fix it.
The eldest democracy we have right now is 300 years old, changes are possible - and patch is welcome.
This whole "cant-do-nothing" John-Galt mental laziness is a scourge on the political climate and debate. I rather hang around with a bunch of stoners who get stuff done and be constructive, then this bards singing praise of corporate mini-kingdoms deriding the lands outside falling apart because the king does not pay taxes to the emperor.