Murky
Deity
Obviously it would be better if there were no poor people to begin with, but to continue to use Mr. Gates as an example, let's forget about his philanthropy and dwell on Microsoft. While you could say that he charges too much for it, it's a popular operating system which has allowed great improvements to be made in information technology and therefore the economy as a whole. Sure, people pay plenty to use Microsoft's system and programs, but that allows them to better their business, hire more employees, etc.; it's an investment that pays benefits to more than just Gates.
Call it extracting from the economy if you want, but how much of that economy would be in the shape it's in without Microsoft in the first place?
Cue Erik Mesoy in 3, ...2, ...
It's difficult to say for certain but without Microsoft's monopoly there would likely be more competing product offerings. Maybe we would be better off without so many people owning personal computers with MS windows on them. Maybe society as a whole would be more physically active and fit.