Whenever the prospect of publicly funding a new stadium comes up, whiners come out of the woodwork.
According to John Wawrow of the AP, in a Buffalo Rumblings podcast, the State of New York collects $20 MIL in taxes annually from player salaries.
Obviously, if the Bills were to move to some hellhole like Toronto, the state would lose that money.
So, if NY were to partially fund a stadium, it could be considered a revenue generator. A taxpayer contribution of $400 MIL would be recouped over a 20 year lease on player salaries alone, and that's not adjusting for constantly escalating salaries.