Without getting into details, a piece of SW(u created) is a tangible product which u charge licence by licence

Even in the US, say a actuary,who use SW to design packaage and can be counted as in the service sector do not really come in large number, say in the millions, like the burger flippers or sales people or prostitutes(mm..,this I'm not too sure, do they charge 'job' by 'job'? The term 'captain of sex industry' suddenly came to my mind).