Or what if they were killing goats naked? Please, that's a silly analogy and you know it. And I think if some Brazilian model travelled to the U.S.A. and dressed the same way she would at Copacobana then, yes, I think her fellow beachgoers would mostly be "forgiving"

The issue of the inherent suspiciousness of "large amounts" of cash goes to the issue of whether or not "unusual" = "suspicious". Some people think they have some sort of natural right to be a busybody, and that anyone doing anything "unusual" is under some sort of obligation to explain themselves. Hence, when these people work as TSOs, they think it's their job to alert to "unusual" amounts of cash, "unusual" ID cards, "unusual" itineraries, etc. etc.

As I've said before, freedom to do only what is "normal" is no freedom at all. The real barometer of society's freedom is exactly that -- how they deal with "unusual" people.