"too much" being $80k last I checked, where you have to pay US taxes on any amount exceeding the $80k. (or wait, it might be that you pay the difference between your US tax rate and the foreign tax rate...)
You're correct. If you're married and file joint I think that number is $130k. So if a dual income family makes $180 that means paying tax, a portion of which was made by someone who isn't and was never American.
Even the Mafia was never so cheeky.