> 1. If there is extra profit one year, these companies will willingly reduce premiums instead of giving bonuses, stock buy backs, or dividends to investors. I don’t know if you have observed the stock market recently
It's the thing competitive markets require of them. If costs go down, one company is going to notice how much more profit they can make by lowering prices and using the lower prices to triple their market share. The others then have to do the same thing or they continue to lose market share.
The buybacks are something else entirely -- they're a result of low long-term interest rates. Companies have at least two ways of raising capital. They can sell stock and they can borrow money. When interest rates are low it makes more sense to raise money through borrowing than selling shares. Buybacks are the reverse of selling shares, so when interest rates are reduced there is a rebalancing which involves companies borrowing more money and buying back shares because it's cheaper to use borrowed capital than invested capital when interest rates are low.
> 2. “Compliance cost” - these things are not done via paper and fax machines. Regulation simply asks one to keep track of, say in the case of medical companies, administration cost vs servicing cost etc - things you would have had to do anyways in your public-good-seeking scenario above
Have you seen the regulations in some of these industries? There is nothing simple about it. It requires you to have lawyers in addition to accountants. And the lawyers are pathologically risk-averse but have plenary control over compliance policy because no one wants to end up in court, so the rules in practice are characteristically much more rigid than what the legislature intended.
Many of the costs are also fixed rather than proportional to customer volume, which disproportionately impacts smaller companies and results in a disproportionately large negative impact on competition.