congress, secret ballot switch

Here in the U.S. our infrastructure is crumbling. Our SCUDA systems are insecure (especially as a lot of them run end of lifed Windows XP), our bridges are crumbling and don't pass inspection, our power grid and water systems need billions worth of work. But there is no political will to get any of this fixed. Conservatives know that if they vote for any spending bill they will have to answer for it at home with their constituents.

I propose giving some legislation the option of being voted on via secret ballot. An independent panel of scientists would analyze the content of a piece of legislation and figure out whether it tried to fix something that, if left unfixed, would be of grave danger to the country. An infrastructure bill would fall under this category but in the more far term climate change legislation might also. Even when legislation conservatives disapproved of passed they wouldn't be in the hot seat, they could make their constituents believe they voted against it (like the guy on a firing squad who believed his bullet was the blank).

Now I know there are a lot of problems with this idea, foremost of which is what constitutes grave danger (it could be used as a pretext to invade another country). But problems need to be solved and what we have now isn't working at all.