The solution isn't to reduce the demand for parking.
It's to dynamically price the parking high enough that there is always ten percent of the parking available.
When there is less or no demand, the price would fall.
Just like AWS services that guarantee certain availability all the time. Sometimes the moment by moment utilization cost can go quite high to accommodate, and it's not to make aws rich, it's to mediate the demand.
Shoup's parking fix would benefit the regular person far more directly than AWS does.