American singers are paid more due to them being more known, so people buy their songs more, people listen to them more, so they produce more songs. As indian signers, no one really knows them or listens to their music, from America, which can pay them. Make sense?
1952 was a year of the Egyptian Revolution, which ended in the overthrow of the Egyptian King (who abdicated in favour of his newborn son in the hopes of keeping the dynasty, but the son was also removed from the position later)
and established the Republic of Egypt.