Quote from Raptorchan »
Ghosts she freed (Ethereal Absolution) secretly were Ravnica's defense forces, and after facing some economic problems after freeing all debt slaves, Kaya just decided to rise up the taxes - and it caused massive upheavals and more casualties, weakening the plane overall right before the invasion (Smothering Tithe). Enough?
Because its wrong to free slaves and let the free pay their share of the upkeep instead? Timing might have been really, really bad, but the act itself doesn't sound that way.