This is a specious argument, based on far too many variables and assumptions. You will need to provide something much more concrete than "what ifs." As for "charging more does not equal collecting more", this argument falls apart immediately as those who do not pay, will not pay AT ALL, regardless of the cost. Those that DO pay, have some kind of insurance to either cover the costs in full, or a large chunk of it.
Your belief that the "the EMS companies are going to eat the expenses anyway, regardless", only proves that you do not understand economics, on any level. The cost of these services WILL be payed, either in the form of higher taxes to you and I, or the cost of services, when these same EMS companies go out of business, due to their "eating the expenses..."
Either way, SOMEONE pays. That "someone", my friend, is the taxpayers.