The US should have set up a subscription licensing program. An A380? $1 million/year should cover it and go down from there based on weight. Drilling a deep water oil well and need a ship to hold station within 1 meter? $5 million flat fee should cover it. Reduced accuracy for pure safety and survival needs should be free.
Then again, the GPS services market from the EU and RU would probably get competitive quickly.
The EU considered charging for Galileo, but gave up the idea when it was clear that the only result would be that no one would use Galileo. They also considered using a completely different signal, which would have made a joint GPS / GLONASS / Galileo receiver difficult to implement, and they eventually gave up that idea too. So having set out to be completely different, thankfully Galileo will end up being a moderately improved, complimentary and usable service.
I think the US DoD was much more forward thinking ("Free GNSS for all!") from the very beginning, to their great credit, even in the days of reduced precision. The story behind Galileo gives you an idea of the mindset of the EU politicians and how the realities of life had to be beaten into them by engineers and companies, so no wonder things like Brexit happen...