The U.S., for whatever reason (it escapes me), appears to have intentionally used the Lend-Lease program as a way of beggaring the U.K.
It's a sad fact. Perhaps Roosevelt felt that he wanted to have all of Europe under his thumb after the war, and figured that most of Continental Europe would be easy enough to control after having been wiped out by the war itself, but that the U.K. needed that extra little bit of leverage because, unlike the Continent, it was never invaded by the Nazis/Axis powers, and was never bombed into oblivion.