Equity can be okay, especially for a union. If a worker is sick and needs to take leave, a union will stand up to make sure their job is protected and they are compensated.
It's not "fair" and "equal" that someone who isn't working gets paid, but we need to take care of those who need help the most.
Equity had tradeoffs, equality has tradeoffs too. I think equity sounds like a more appropriate word for what a union does. Do you disagree?