[liquidify]

It is not a 'solved problem'. Price controls are not easy for anyone to manage. Companies can easily find ways around them in many cases.

Enabling companies to categorize themselves as 'platforms' or otherwise and then stipulating both benefits and requirements based on those labels makes a lot of sense comparatively. The general problem though is that the government isn't typically using regulations to improve freedom and competition. The government looks at regulation as a way to extract money, so solutions that encourage competition on a level playing field through market forces (like OP's) aren't given fair consideration.