Why governments' attempts to pick winners produce more losers than winners.
"It is the highest impertinence and presumption...in kings and ministers, to pretend to watch over the economy of private people, and to restrain their expense... They are themselves always, and without any exception, the greatest spendthrifts in the society", The Wealth of Nations, Book II, Ch.III
"Vote for the man who promises least; he'll be the least disappointing."