The priest never allowed anyone to know how much money the parish took in. He never published an operating budget or accounting as the previous pastor did. He also overlooked certain irregular situations such as remarriage without annulment, baptism of those children, Holy Communion, etc as long as those individuals made significant financial contributions. He refused to give Anointing of the Sick to people dying in the hospitals because he couldn't be bothered to show up.
There are many more stories of his personal corruption. He was a friend of Mahony.
I know a monsignor here who takes fairly frequent trips (fishing, camping, international stuff) but he has family money... the only son of a fairly well to do family and his mother left it all to him. Glad he doesn't gamble like your guy though.