Humanity is endlessly capable of finding ways to do anything (good and bad).

Unions and employers negotiate what kind of decisions are made and how, but they're hardly inclusive of every last thing.

Some of the worst employer's I've had were union shops. It's entirely possible to have the opposite experience too, but there's nothing about a union that prevents toxicity.

For the record I've zero experience with how Kickstarter is / this isn't a comment about how or if there are issues at Kickstarter with such things.