Corporations are like wild animals.

Individual people are diverse and creative. The behavior of large organizations differs because that individual behavior is getting merged into an aggregate. The choices of any given individual are diluted to such an extent that the organizations then behave stochastically in response to incentives, and therefore the same as one another when they're operating under the same set of incentives.

Which corporation would you propose to shut down? It would have to be all of them, and then the ones that replace them again. And the government itself, since it too is a bureaucratic organization that will engage in regulatory capture to expropriate more funding/power.

You cannot prevent the incentive to seize power, which comes from human nature. What you need is a system which is structurally resilient against its concentration/centralization.