Tithing.

Christians aren't biblically required to tithe 10% of their income, pastors say.
https://www.christianpost.com/news/christians-arent-biblically-required-to-tithe-10-percent-of-their-income-pastors-say.html

Interesting - but certainly not something to be used as 'a cop-out'.
More interesting, perhaps, was the very generous giver who explained to me that the 'tithe' is actually 2.5%. The reason for that is the nature of the taxes we pay. These cover the other 7.5%.
We must establish the principle that we should all give until it hurts. Doing that and maybe the whole 10% - or MORE - comes back into play.