Note that this is exactly the thinking of the Democratic Party. Geithner almost used that exact phrase to a House Budget Committee: "We’re not coming before you to say we have a definitive solution to our long-term problem...What we do know is we don’t like yours."

This has also been their policy on the budget and larger fiscal issues, now passing three years in the Senate without a Democratic budget proposal. But that's another story.

A person taking this attitude during a crisis is not useful. On a sinking ship or a crashing plane, a person saying only this would be locked in a closet so his noises didn't disturb the people who had to think.

Conservative solutions have been many, and detailed, and do not fall into the category you state. I've posted links to most of them.