>The guarantee is robust market competition. If one company overcharges they leave themselves vulnerable to losing business to someone else that will undercut them
>Deregulation means competition for business. Over regulation and price controls means further market exits and the taxpayer increasingly left exposed to catastrophic risk
We have seen that spiel repeated time and time again for 50 years now. Those backward flyover states that are the strongest practitioners have remained backward flyovers.
If anything they've been left behind even further as deregulation stagnated them. None of them have caught up to more heavily regulated areas despite over 50 years to compare the two.