Richness has very little to do with income. Wealth is a gauge of richness; income is a gauge of value to an entity. You can make very little and become "rich" if you are frugal enough.
Business owners can move their businesses wherever they wish, and they normally move to where it is most financially beneficial to them. New York made a bunch of concessions to Amazon to get their headquarters because it will be a net positive to the area. Perhaps you think they should have been run off and sent elsewhere because it's just not fair.