Why? That answer is simple: power. Some countries are simply too powerful to do much about. Every time a country goes way out of line, it becomes a calculation

Why? That answer is simple: power. Some countries are simply too powerful to do much about. Every time a country goes way out of line, it becomes a calculation of how important it is to stop it, versus how expensive it will be, both in direct and indirect costs. And because of this, powerful countries get away with stuff that less powerful countries would never get away with. Don't look surprised. The US has also gotten away with stuff that a smaller country wouldn't have gotten away with. These countries can only be stopped by their own internal processes, but its own people. Not by foreign countries.