Nothing wrong with the idea per se. But, as usual, no explanation for how the incentives and cultural changes needed to induce people would be implemented. Sorry, but no one is going to reward a grad student, career-wise, for rewriting other scientist's papers and catching bugs. Heck, the only reason scientists proofread their stuff <i>at all</i> is to avoid embarrassment. If there were an army of students eager to fix your mistakes, scientists would be even <i>less</i> careful.