Christians give freely. That is my perception. I once told a Christian how much it took to send our daughter to Jewish summer camp. She was shocked. It was heavily subsidized by donations.
Christians give freely and often.
The donations are not big lump sums, but many small donations made frequently. Along with a heavy dose of volunteerism, it works. I understand that Jews used to do this too. About a month ago my daughter told me about some billboards she had seen depicting two babies, one white and the other black, holding each other. This billboard is put out by the National Conference of Christians and Jews and it had a phone number on it.