Con-Agra was going to get tax abatement anywhere they went, and in fact, even with the tax abatement, they're going to be paying more taxes than they did in Omaha after the move to Chicago.
Boeing's tax bill also went up after the move to Chicago. However, the Federal subsidies were enormous. And again, those subsidies had nothing to do with the City of Chicago. Every state in the US offers companies sweeteners to move. It's why we have a race to the bottom in this country.
So really, you're the one who's wrong.