I worked for a scumbag just like that. However, when the second paycheck was late the aircraft did not move.
Sat in Alaska at a no star hotel for 7 days. Only flew after getting paid. Then found a better job 6 weeks later.
It's one thing to help an employer if money is tight. It is totally unacceptable to do it month after month.
I guess Skylease/Centurion pilots are like abused spouses. They stay because they are so abused they feel like no other airline would take them and they become used to the situation.