"When a man spends his own money to buy something for himself, he is
very careful about how much he spends and how he spends it. When a
man spends his own money to buy something for someone else, he is
still very careful about how much he spends, but somewhat less what
he spends it on. When a man spends someone else's money to buy
something for himself, he is very careful about what he buys, but
doesn't care at all how much he spends. And when a man spends someone
else's money on someone else, he doesn't care how much he spends or
what he spends it on. And that's government for you."

--Economist and Nobel Laureate Milton Friedman