We’ve already had quite a few threads on this. Some Catholics (some of them have posted in this thread) agree with the idea of not giving money. They usually give something else instead, such as volunteering or giving that money to some charity. So if you want to do that, fine. Not everybody is going to agree with you, some of us still give money to the Church, recognizing that our parish has to keep the utilities turned on and fix the roof, etc.
Your personal thoughts on giving your money or not giving your money is a bit of a different topic from the original post which suggested that a bishop had told his flock it was a mortal sin to not contribute. Then later you said it was the K of C who said that. And there’s a lot of background missing.
If this thread is really about what you think about giving money to the Church, then you’re entitled to your opinion. I’m not really interested in arguing that and can’t say that I care. Also if you think priests are living a “lavish lifestyle” you and I obviously aren’t hanging out with the same priests.