Not necessarily -- you are comparing apples to oranges -- the USA is a huge country, self-sufficient and was far, far away from the theatres of war -- except for Pearl Harbor it was not really attacked on home ground and could manufacture away with no fear of bombing.
The UK, on the contrary was a mercantile economy, right next to the theatres of operation. One part of the Empire, namely Canada came off pretty well from the war, but the others, India and Australia were also directly threatened during the war.
Britain's factory were irrefutably damaged by German bombing raids and they outsourced much of the large scale manufacturing to the US, destroying much of their economy. HOWEVER, the overall "enterprise" that was the British Empire came out of the war well enough economically compared to other "enterprises" except of course those in the Americas.
The British also realised that they had lost the opportunity to make India a dominion and that they could not morally keep India a colony when they had supposedly fought for democracy.
And of course the Indian freedom movement felt that keenly too! Remember that before WWI, the Indian civil movement was aimed at getting Dominion status but after that "war for democracy" the question was "why not democracy for us too?"
It beats me why the British did not establish a solid manufacturing base in India -- because the Empire's centralization was India provides the cheap, captive source and the cheap, captive market. The manufacturing was in England. This was changing somewhat under the Tatas but not enough.
That was the problem. So in effect, the British had to ship industrial supplies at great cost and under great danger to contain the Japanese. If the US had not entered the war on the side of Britain, British possessions east of the Suez would have been lost.