Insurance will lead to escalating medical costs? Insurance is merely a way of pooling resources. The users pay premiums. Those who remain healthy pay for those who fall ill. The insurance company cannot pay doctors more than what they collect in premiums. In fact, part of the premiums go into company profits. If medical costs escalate, then premiums must go up in order for the user to enjoy the same level of financial coverage. It is therefore increased medical costs that lead to increasing insurance premiums, not the other way round.
Lets say there are no insurance instead. The medical costs are dictated by supply and demand. But because the wealthy can afford it, they will ensure that costs never fall below a certain level. This would mean the poor will not be able to afford it. Because there is no pooling of premiums via an insurance mechanism, the poor are denied medical treatment.
Bottom line: insurance does not increase cost. It is demand that increases cost. Medical cost is rising because of demand, not because of insurance.