I was trying to think of simple legal changes that would make America better for everyone.

The first one that comes to mind is: "Set corporate fines for ANYTHING to be minimum 150% of the money they profited from their lawbreaking, as assessed independently by the government".

Get rid of the concept as "fines as a cost of doing business" and turn them into actual deterrents.

This comes from Yet Another "Oopsie' from local chemical plants.