It's absurd to think that there is no tax money being injected into the city simply because the corporate tax collected is low. They are spending their profits! Some of it in Seattle, and in other places they have physical presence on wages, real estate, etc.
Honestly you need to explain your premise that they contribute nothing... it's illogical. Where is the money going?
Why are "taxes" the only way citizens of a community can prosper? Do wages not count? If they do count, would you like to argue that Amazon is not paying wages to thousands of employees?
Do those employees pay taxes? Taxes aside, are the wages themselves beneficial?
One final point: "tax breaks" in and of themselves seem silly to rail against, like a shareholder being upset at "discounts".
Is your contention that a city giving any tax breaks will see less tax revenue as a result of Amazon coming into their city than if they didn't? Surely it's a question of how much no?