The pharmacy company Boots was subject to a leveraged buyout; then it began running its staff ragged, endangering the lives of sick people. Of course, also not paying taxes.

I think it would be appropriate to impose a special tax on companies that have had a leveraged buyout. That would discourage the practice for the future. For the companies that have already suffered a buyout, this could drive them into bankruptcy, at which point they will be sold off for a much lower value to someone who won't have to run them with an extractivist approach.