You don't solve it, you can only manage it. Same reason it's called as Dismal Science. As long as we don't solve first the mystery of human brain, or we don't act like robots behaving in certain ways there will never be a perfect economy. Also, the economy is much more complex than having winners/losers. There's such thing as win-win situations such as renewable energy or lose-lose situations like natural disasters. Only Technology can "solve" or compromise with our economic problems.