I didn’t mention “free” parking, I did mention parking off FBO leaseholds with fixed (not event based) pricing for those who don’t choose to do business with a monopoly. In the airports where this already functions effectively I’ve noticed asphalt public parking ramps, not concrete, and it’s a lot less costly. The money that paid for the infrastructure is the same money that pays for everything else at any public airport, except for tenant improvements on the FBO leaseholds, and it was done a little at a time like developing the rest of the airport.
One solution to managing capacity of first come, first served public parking is online booking. There are others. Regardless, it will fill up on event weekends but more parking for many more people is better for the taxpayer than zero parking for anything but a few jets carrying a few people paying thousands of dollars each to FBOs who then pass some of the proceeds back to the local government owner in a self feeding cycle of corruption that eliminates public access to a publicly owned airport that was not built or maintained by the FBOs that lease a patch of land there.
US public airports are not for profit businesses, they are in general government funded infrastructure. Managing them needs to take that into account. I’m personally an unrepentant capitalist and long term multiple rental property owner, but if you apply the rules for free markets to taxpayer funded infrastructure what you end up with slowly moves towards corruption and eliminates public access. What’s sad to me in reading this thread is that obviously some of the posters are completely naive about GA outside of the US and how it has already (decades ago) gone down this route.