It's a huge misallocation of resources but of course people simply point to the fact that they are "making money" as a sign of success.
And yes, they are indeed "making money". That is the problem.
A total disaster for the west, if they don't reign this in it's over.
EDIT: fascist hacker news doesn't like it when you talk about usurers
To clarify:
if it's so efficient why is it such a large part of GDP?