If this is trying to be clever, it could use some work, and if there's a substantive point, I'm not seeing it.

The point is that your purported, self-glorifying norm asks one to pay the default PoS tip of everyone who demands or might demand it in the future, to say "yes" to all of them. Counter purchases, grocery stores, fast food, whatever.

Could you maybe consider that there might be better and more practical heuristics?