Proportional representation would make a huge difference. Either STV, or STV, or party lists. Any proportional system would be good.

In an anarcho-capitalist city-state you could have a fiat cryptocurrency system that has software for electronically programmable sanctions. Everyone is given a basic income from the local treasury organization and pay fees when purchasing products and services. The community programs in fees to pay for basic infrastructure, a legal system, and financing public projects. A percentage of the fee revenue goes back to the local treasury organization.

There could be a hypothetical society that has ai ran corporations that have programmable ownership shares. Replace all executives with ai agents and program the earnings to be equally divided with the workers of the company. Everyone would get paid once with a salary and once with a share of the earnings.

Conventional companies would have to compete with a company that pays their workers twice and gives them equal ownership in the business.

The funding they would get still originates from government spending or banks chartered by the government and consumers are using a government currency to facilitate trade.

What would be the medium of trade with another countries?

Money is created by a government. Corporations use government created money to facilitate trade.

Taxes shrink the money supply after the government creates new currency. Taxes help to create a demand for a currency.

Maintaining a large private army would be expensive and time consuming. What stops another corporation with a private army from coming in and robbing them of everything they have?

Where is the corporation getting their funding from? Someone's got to be paying them. So, they are using a sovereign currency created by a government using a central banking system chartered with the government.

Who is bankrolling all this?

Governments have courts to enforce contracts and settle disputes. Corporations don't have their own impartial legal system to settle disputes and enforce contracts.

Governments can create as much of their own sovereign currency as they want. Governments can levy taxes corporations can't.

A government can create unlimited currency via an act of congress. Can a corporation create unlimited money when it wants to?

Could the paramilitary unit fund itself without legal tender laws from a state and government created fiat currency?