I wonder if there should be consumer protection laws that require anyone selling a product to disclose all the kickbacks they receive on that product to the buyer?

I would love to know how much each product placement in a movie cost, how much some shady third-party paid to have their bloatware installed on all new laptops from a particular vendor, how much it cost to set the default browser, how much a TV manufacturer was paid to include a "smart TV" device in their product, etc..