Why can't scientific method always be used to solve social, political, ethical, and economic problems?

In fact, science helps a lot for social, political, ethical, and economic problems. Your question is just to deny that science is not helping your life and you have no evidence to support what you say.

Explanation:

alfred von schlieffen, german army chief of staff, was given instructions to devise a strategy that would be able to counter a joint attack. in december, 1905, he began circulating what later became known as the schlieffen plan. schlieffen argued that if war took place it was vital that france was speedily defeated.