Re: $50
Many moons ago I took the bus across the Andes from Santiago de Chile to Mendosa in Argentina.
Chile at the time had one thing going for it: The police was not corrupt (this might still be the case, I do not know)
At the border, the bus was driven into a building for inspection. Leaning against a sign saying that in Argentina it was forbidden to bribe the police, the border guard held out a paper cup and all passenger of the bus dropped in what they could spare in change.
The inspection thus correctly completed, everybody was allowed to enter the bus, and the trip continued.
On a side note;
Interestingly, the social system / safety mesh in Chile at the time consisted of having to hand over change to poor people wherever you saw them.
Stop at a red light? Pay the guy with the dirty rag.
Park your car along the road: Pay the guy that "owned" that stretch of road so that he would "protect" your car from getting scratched in your absence.
And so it went, with a new scheme for every situation.