... and lobby governments to produce policy that keeps them extremely profitable

This is the problem. The problem is not corporations themselves. The problem is, whenever government exerts control over the business sector (any business sector), it is just a matter of time before corporations co-opt the decision-making power and get the government to enact regulations that entrench the status-quo corporations and lock out would-be competition -- a process known as regulatory capture.

Here's a potential solution I encourage my students to evaluate and critique: transfer all regulatory power and authority in the U.S. to the individual states.

Under that scenario, if Jeff Bezos wants to get legislation enacted to hinder all would-be competitors, he has to bribe (or otherwise influence) 50 state legislatures and 50 governors, instead of just a handful of powerful D.C. politicians.

All it takes is one hold-out state to provide fertile ground for a would-be competitor to take root. Under the current system, regulatory capture is endemic and impossible to stop.