I never said "price regulation". The government should take steps to ensure things are priced fairly and (even more important) transparently. That will look different for different markets, products, market structures (sometimes the government needs to break up the monopoly), ... The situation in healthcare is very complicated and has a lot of moving parts, but the situation in energy less so (AFAIK), it's just that some externalities are not accounted for at all. Opposing that you have lobbyists (e.g. oil) and ideologically-driven players (e.g. some people want to ban meat).