The inefficiency of the bureaucracy of limiting welfare (or charity) to the poor and needy. I don't know, though, maybe giving everybody's money to everybody cancels itself out.

You're giving money to everybody but then anyone who isn't poor and needy has to pay taxes on their income that more than offset the money. It's taking "the bureaucracy of limiting welfare (or charity)" and folding it in with the IRS and the local Department of Revenue.