I remember an article that some ambulance drivers are doing it as volunteering (they are trained). There could be a rideshare/gig-economy take on deploying more ambulances+drivers subsidized by hospitals/government: and drivers can be called in on-demand during surge - local community folks would be driving anyway.

I understand EMT are very well trained. You would want those techs to be as trained as possible. So that could be the limiting factor.