His work personally started everything else. Without him, there wouldn't be an Amazon, and none of those other jobs would exist, and trillions less value would exist in the world.

Though to be fair, a good counterargument to what I just said is that likely something else would've existed, so it's not true that trillions wouldn't exist, just the difference between Amazon and the next best thing. And there are still plenty of good reason to tax Jeff Bezos heavily enough to make sure there is less disparity, or organize society differently to not allow such a large difference in wealth. I mostly don't agree with those arguments, but obviously there are some good ones.