The last thing

You know the expression, "The last thing we want to do is (whatever)"? That always sounds funny to me. "The LAST thing we want to do is spend all our money on gas." It's like you want to do everything else on your list, and THEN spend ALL YOUR MONEY on GAS!

I once read a list of items a company claims they try to accomplish. Bottoming their list was "Ultimately, we want to do right for our customers." I suppose I could state, most accurately, that "the last thing XYZ Company wants to do is what's right for their customers."