This is essentially the way it works in Switzerland. On motorways there are speed cameras every few kilometers: even with an app to warn you, it’s not worth trying to speed between cameras.
I heard it does not apply to all cantons, the Italian ones speeding is more OK.
All that being said I really dislike the US system where you can pass a police car driving 75 on the 101 and he doesn't care. There has to be some enforcement of the rules.
The US system is a probable cause generator.