Bob, I like the way you think! We could do the same think with spending bills - a single, simple purpose, that has to meet performance goals. Last I heard, there were still two federal employees assigned to teach proper farming techniques - in Las Vegas. And the number of times something useless and unrelated is tacked onto essential bills, because it wouldn't pass any other way...!
(Sorry, gentle readers - we're pretty far from rocketry but hopefully of interest anyway)