The value that companies such as Microsoft & Apple provide is supplied by all their thousands of employees, not just their CEO's. So its not a fair comparison to compare the output of Microsoft & Apple with the output of a single person (Tommy Flowers). Furthermore there are plenty of alternatives to Microsoft & Apple: if Bill Gates & Steve Jobs didn't exist we'd be probably be running Unix, Linux or one of the many other operating systems that lost out to Windows & MacOS for market share. If Tommy Flowers didn't exist we might have lost the war.