States are made of people both at decision and at street level. Many anti-trust laws were made when the decision people that were not very tied with the actual interests - nowadays this seem to change. At no point I think people at street level ever understood the actual implications.

A structural solution is to educate and lift the whole population to better understand the implications of their choices.

A tactic solution is to try to limit the collusion of decision people and private entities, but this does not seem to go extremely well.

An "evolutionary" solution (that just happens) used to be to have a war - that would push a lot of people to look for efficiency rather than for some interests. But this is made more complex by nukes.