[r00fus]

In this case, I think I trust vested interests (teachers unions) more than unaccountable external parties with billions of dollars.

I also question whether it's "philanthropy" or just plain business - meaning these foundations see a way to make a profitable "omelet" by breaking the public education "eggs"?

[barney54]

But the vested interests(teacher's unions) aren't vested to protect educational outcomes, but the teachers. I don't see why we should trust them more than large donors to charter school campaigns.