Tithing is an Old Covenant principle.
But we are under the New Covenant now!
And under the New Covenant, ALL that we have belongs to the Lord ... our monies, time, talents, etc.
More than 10% is required of us now. Our entire lives are His, not just 10% of them.
But yes, I know. Many churches tell us differently.
I recently heard one Protestant preacher actually say that we are 'cursed' if we do not tithe 10%. (Yikes!)
And he preached on this topic, 3 Sundays in a row.
(To me, a total waste of 'air time'.)
Under the New Covenant, we are told to be generous givers.
Our Heavenly Father is generous; as His children, we are to be generous, too.
How generous ... and towards whom ... should be a matter between ourselves and the Lord.
... those are my thoughts on tithing.