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This can be done via taxes but insurance is a private market solution which should in theory make it more efficient for the sake of maximizing profit.Imagine there's a single, private, insurance company, A.
Wouldn't the natural interest of A be to maximize health costs (i.e. make paying for health coverage expensive, as thus their insurance more desirable and more expensive in return)?
And if there were more smaller insurance companies competing with A, wouldn't it make sense for A to just eat them up to eliminate competition (so, having us end up with an even larger company)?
And if there were several equally large insurance companies aside A (say, B, C, D), wouldn't it make sense for them to collude and keep prices and profits high?
And since A (a single large) or A+B+C+D (several large) companies surely have considerable clout (money gives you that) isn't it their natural interest to spend on buying politicians, media, etc, to make sure things get even more in their favor?
All those seem inevitable (and profitable) in a market economy. How would insurance being a private market make it "make it more efficient for the sake of maximizing profit"?