There are other issues in all of that, but for the current discussion, I think it's enough to argue that discovery of exaggeration (the equivalent of resume padding) is still a very difficult problem in academic papers and citations. Do researchers have the tools to methodically sift out the good from the meh? It doesn't seem so. Combine that with the lack of incentive (as seems to be the case in Reinhart-Rogoff) to disprove published findings, and you have a scenario in which gaming the system seems quite doable.