"What I would be in favor of, however, is a regulation for 401-K plans to prohibit investment in the company or company affiliates (subsidiary or parent or sibling). Otherwise, obvious serious conflicts of interest are possible. It's a bad idea, in any case, to have all your eggs in one basket."
I'm assuming you mean preventing the employees from selecting company stock as their 401-K investment.
I can't agree with your regulation idea. For every person who's prevented from losing their shirt from that regulation, we can find another that the regulation prevents becoming rich.
Your last sentence says it all. People make choices. Some are good and some are bad. On principle, I think the government should not be in the business of preventing people from making what could be bad choices.
Brian Bronson