At this point I stopped reading the article. I'm concerned this author(a polisci/economics professor)'s definition of 'hard' is functionally equivalent to 'only for the wealthy whites' again, as the specific time period he cites as the beginning of college becoming too easy (1960s) coincides exactly with desegregation (board vs brown was mid 1950s) AND he specifically cites disadvantaged backgrounds as part of that reason. If I'm mistaken and the author later addresses this, let me know and I'll actually finish the piece.
I am in general in agreement that grade inflation is a problem, drop out rates should rapidly increase to help stem degree inflation in our populace, as this is associated currently with saddling our future with increasingly difficult hurdles, which will eventually bite us in the form of lagging social security, population shrinkage, and economic instability. However, the arguments being used are immediately suspect to me.