Don't be fooled by the fancy churches, the Catholic Church is in a LOT of debt, they just don't have to pay it very quickly simply because they are a religious body.
Evangelical churches are a bit different. Pastors of Evangelical churches can make very, very nice salaries depending on church size and how charismatic and likable they are, but most Protestant churches have enormous mortgages and other loans. Catholic Priests are usually pretty poor.