it would feel more right for big stars to have to pay everyone else's wages for wasting everyone's time being a diva.

I dig the sentiment for sure. Like you said it's friendly to capital, but the larger idea of "the diva is burning away everyone's time, the rest of cast and crew ought to be compensated and the diva ought to have their behavior corrected" makes sense to me.

Maybe more reasonably, productions should be less penny pinching in the first place and maybe The Rock Does Christmas doesn't need to exist.

In wholehearted agreement there.