I have no problem with the government spending tax money on things but resources are not infinite (eventually you run out of other people's money) and in lieu o

I have no problem with the government spending tax money on things but resources are not infinite (eventually you run out of other people's money) and in lieu of that they should not be spending taxpayer money on services private entities are willing to provide. What if private entities are willing to provide an essential service, but due to effects like lack of effective competition or economies of scale, most/all people wind up paying more direct to the profit-making private entity than they would via tax to a publicly funded service?