Because the entire UK is the size of Texas. I was just chatting with someone about this earlier today. College athletics have a lot more funding in the US. The US is a huge country. Look at the size of the US compared to the UK. The UK is tiny.
They don't call America the best country on earth for nothing.
Even with all this talk of our economy in shambles and the US going down the pipes, we're still the best damn country. All those other countries don't even come close, at least not for another century.