You give zero facts for your claims.   Long before the ACA I saw my companies health plan skyrocketing in cost.  Not only was employee contribution increased the copays were being introduced and increased every year.

I would agree the overall cost of care with a fully insured population is likely to put stress on the entire system, like a boat built for hundred passengers trying to now carry 200, threatening the stability for all.    But the answer isn't in kicking half the people into the water, it's in improving the capacity of the boat.  

There are lots of steps we could be taking, first in my own mind is the need for more physicians at every level of care.   The cost of subsiding students educations in medical field will be offset by prices to pay for eduction. The health of more people has value, both morally and financially as well.

We can lower the cost of drugs, simply stop advertising them and paying off doctors to sell big pharm drugs.

You must have others?