The United Kingdom, which unlike the United States is quite literally comprised of different countries, has managed to solve this problem.

Australia also has a similar setup to the USA, and has also managed to solve this problem.

I don’t know the inner workings of every country, but I assume there are more in the same position.

I’m sorry, but the USA is not in some crazy unique position that no other country has ever faced before. You just choose believe this inaccuracy.