That' true, but now everything depends on "what is economically feasable" and unless we are experts ourselves we can't really know. We need to rely on experts to tell us what is economically feasable, but those experts are the ones under pressure from lobbyists to say one thing or the other. Some parties says that it's economically feasable and that will actually save money, other parties say that it's not feasable and it would cost too much.

Oil companies and countries that sell oil will say it's not feasable and companies that produce panels says that it is.

We cannot rely on "what is economically feasable" because unless you are and expert you will have to get that info from one side or the other, and even independent bodies will be under lobbying pressures.