I think you are right, and it would be better not to focus on trying to micromanage specific business practices. You cannot write a good set of regulations that will prevent companies from siphoning wealth, because profit is the entire reason for existence of a company to begin with, and they will either find a way around it or stop functioning. Instead I think they should be allowed relative free reign, and the market allowed to do what it does, except that in the end a portion of the wealth extracted is taken and given back to the people, such that the level of concentration is kept stable instead of perpetually increasing.