Let’s do some math:
130,000,000 households x $0.41 first class rate = $53,300,000.00
It’s going to cost the government 53.3 million dollars to let us know we’re getting a tax rebate. Let’s assume these letters are mailed standard at a bulk rate, you’re still looking at over 33 million dollars and this doesn’t include the cost of producing these letters.
Find someone who doesn’t already know they’re getting a rebate and punch that person in the gut, it’s cheaper than spending 53 million dollars. Trust me, I’ve calculated it on my TI-83.