Ask the U.S. Soveirgn Debt.
LSE is the best business school in the world, that'd be a pretty good reason. Unless you can get into Yale or Harvard, but then again they aren't better than LSE they're more prestigious. Still though it's pretty hard to rank because the Peer Review for the US Universities is done by US people and vice-versa world wide.
Also Businees in the EU is Business, in the US it's Neo-Liberal Economics
Basically a better degree for less money, I don't know why you'd want that.