I won't say it would be 'complicated', because in theory that sounds very simple. In practice, powerful corporations have enough influence over the government

I won't say it would be 'complicated', because in theory that sounds very simple. In practice, powerful corporations have enough influence over the government that regulating them in that manner isn't possible without flipping the whole system on its head (i.e. removing the profit motive that drives monopolization and cost externalization).