Said letter is "R" --- God tells us to "PRAY with
faith and without ceasing", whereas the IRS tells us to "PAY with
faith and without ceasing". Otherwise, both "mighty entities" are essentially the same... they act like they've got your best interests at
heart, but in reality they just mercilessly "milk you for all you're worth" and then turn their backs on you when you've been drained dry... no further explanation necessary.
Come to think of it, the
single-letter difference between God and the IRS isn't the only direct correlation between the
two "superpowers" --- because the IRS tells us to PAY so much, it causes poorer
folks to PRAY to God a lot more due to their worries over becoming even more destitute from shelling out for their income taxes!