Not only does the US Government have no authority over foreigners (not on US soil), those foreigners have no authority to direct the US Government, by means of voting.
Every democratic government's primary interest is making it's citizens happy - that's how the elected officials get re-elected. It's really that simple... For the vast majority of the citizenry, that means the basics: food, water, education, safety, healthcare, etc.
All people (and thus their governments) are inherently selfish to varying degrees, they always want more for themselves, whether it's better food, a bigger house, or improved safety. And they will gladly take personal enrichment, at the sacrifice of others if need be, it's basic human nature. Obviously there are limits, both practical and driven by needing to live communally, whether at the person-to-person level, or nation-to-nation, and that drives just how much we're willing to screw-over someone else to improve some facet of our own lives.
Since we're all trying to get ahead, governments need to keep an eye on each other, to maintain their own standard of living, that will never change. And modern technology has made it easier than ever...
I'm not saying "deal with it", because there do need to be limits, but they will always be driven by ANY government looking out for it's own citizens' well-being first and foremost. If they can achieve that through cooperation, awesome, but sometimes it'll be through subterfuge.
