NYC Educator has this take:
Imagine you run a charter school. Now, you've got the teachers and kids working six days a week, and longer days and years than public school teachers. Though you boast about how you pay your teachers more, for the time they work, you actually pay them less. The health insurance you offer is not equal to that which public school teachers have.
And of course, if anyone looks at you the wrong way, you fire them. Some NYC charters have fired the entire staff in the same school year. That's because the teachers were terrible, and had nothing whatsoever to do with administration making poor choices, of course. In any case, every time you get rid of one teacher, you hire another at minimum salary. No one ever makes it to maximum salary, except maybe one teacher who you trot out for press conferences.
. . . .
So by the end of the year, you've saved a bundle. What do you do with the extra money? You're on salary, technically, so you can't just keep it (you could do that more efficiently with vouchers).
Whopee! Let's spend five days in the Bahamas on the taxpayers' dime! That's what they do over at KIPP! Forget about vacationing with your family. First, you don't have time, and second, you can't afford it. It's go with your slavedrivers or don't go at all. . . .