What on Earth makes you think they aren't doing this? There's no single corp announcing a possible move to anywhere as big as Amazon to illustrate the incentive to compete, at almost any price.
In other words, construct a hypothetical move for a hypothetical corporation to some example town, and I'm sure that town could come up with an incentive package that would be beneficial to its citizens in place of having the company not move there. Do you disagree?
I am almost perfectly certain that they're not doing this because I was referring to all of the organizations, and individuals, that are not as big as Amazon.
I'm claiming your argument is suspicious because it seems to only really apply to organizations of Amazon's size. Maybe you disagree, but it sure doesn't seem like any cities or towns are interested in luring an Amazons worth of businesses and tax-payers that aren't a single organization. The argument seems pretty agnostic; why is no one else?
New York State offers to waive all state income taxes for something like 10 years if you move there and start a new business in one of their special economic zones. There are more of these programs out there than people realize.
That's a good counter-example, but still pretty far from 'accept any net-positive benefit' (however close to zero).
Moreover, there only seem to be three such zones in the entire state: parts of upper Manhattan, parts of the south of the Bronx, and some parts of Yonkers.
In other words, construct a hypothetical move for a hypothetical corporation to some example town, and I'm sure that town could come up with an incentive package that would be beneficial to its citizens in place of having the company not move there. Do you disagree?