A public use was deemed to embrace increasing taxes, which in turn would empower purchase of other things more tangibly put to public use.
This is not the first time the USSC ever has used an indirection argument like this, I highly suspect.
Whenever you have a City Hall you always run these kinds of risks. Kelo brought out into the open what had long been happening behind the scenes with a nod, wink.
The proper answer is local law. I think every state should have the onus to regulate this sanely, or risk losing people who disagree that real estate, in the end, belongs to Caesar anyhow.
In other words, the term "Public Use" was deemed to be something it is not. If I call heads 'tails', does that make it tails?