I once read our excess money is given to us to share with others. This is something I’ve tried to incorporate into my own life because I feel there is good Biblical precedence for it. Early Christ followers shared all they had with each other (Acts 4:32-35). This seems to go even beyond simply giving away our excess. In the Old Testament, God gave laws commanding people to not harvest the edges of their fields so the poor could come and get some food for their families (Leviticus 23:22).
Jesus told us not to hoard our wealth (Luke 12:16-21). The next question I generally get when discussing this is, “How do I determine how much is excess?” To me, this question is always the result of a scarcity mindset.