Here's the latest follow-up to the broken pipeline report (from AAAS/ScienceCareers)

http://sciencecareers.sciencemag.org/content/view/full/18742

Again, increasing money at the early stages will only further clog an already saturated pipeline. Sure, it may be easier to pay someone a decent salary at the beginning of grad school (relative to other opportunities), but the key point here is that those people will have expectations from the investments. As the author points out, here the problem is not easily solved by pushing money onto early career/beginning scientists...