It isn't that they can't see the solution. It's that they can't see the problem. They can't see the problem if they are looking in the wrong place. They can't see the problem if they have blinders on - for 'none are so blind as those that will not see'.
Saying this, he turned his head toward the window as if he were trying to solve the problems of human existence by concentrating on the beauty of the universe.
The leftist is anti-individualistic... He is not the sort of person who has an inner sense of confidence in his own ability to solve his own problems and satisfy his own needs.
A problem is something you can do something about. If you can't do something about it, then it's not a problem, it's a predicament. That means it's something that must be coped with, endured.