Microsoft and Cisco would own the world, and you want their customer support to take the place of government?
No, Microsoft and Cisco wouldn't exist because they are based on government enforced intellectual property laws.
What's the difference between a monolithic state and a megacorporation?
If you don't want to give your money to a state, you're kidnapped or murdered. If you don't want to give your money to a corporation, you're forced to do without their goods or services.
Why not impose a central state designed to mitigate the greedy, evil tendencies and maximize freedoms?
Who do you think is going to try to seize control of the state hardest of all other than the evil greedy bastards you're trying to stop?