Paul charged Christians to give as they prosper-1Co 16:1-2

He he instructed them to give according to what they have-2 Co 8:12-13

Our giving should be in keeping with the level of our prosperity.

Seek To Excel-Paul called for Christians to abound-in the grace of giving-2 Co 8:7

With God's aid we can abound in every good work- 2 Co 9:8-10.

Jesus tells us to surpass the righteousness of the Pharisees (remember their meticulous tithing?)- Mt 5:20; Mt 23:23

If the Pharisees gave tithes (actually 20-20%) do we surpass them by giving any less