I'm always amused by the accusations of "class warfare" that, essentially, work from the bottom against the top. Somehow, in this Randian wet dream, the vulnerable rich are the prey of the savage, lazy and evil masses. Yet, in our society, we have continually expanding gaps of wealth disparity while the same people benefiting greatly from our laws and financial practices are able to simultaneously play the victim in a brilliant ploy that has fooled millions in this country to vote against their own self interest. I have no idea why people who make millions by letting their investment money sit there, paying lower taxes than the average person for doing nothing, is better than a guy busting his hump digging ditches for practically nothing. I guess it works in a world where your value as a person equals your bank account, but I'm not seeing it.
As far as the GPA example, it's flawed like any example that tries to demonstrate the perfidy of the underclass. It comes down to the question "What is fair?" You can argue, in a strict sense, that the quality of the work equals your grade. However, I've seen numerous situations where "fair" is a relative term. Some students can afford tutors, others can't. Some students have parents that provide for them and get the free time to pursue their studies. Others have to provide for their families as teens and work for 8 hours after school. Some students have their parents available to them, while some have none or can even be homeless. The contingencies are endless.
So, again, what is fair? If you had a student on one side with two stable parents, nice home and the emotional support would she be a better, more worthy student than the one who has been abused by their parents/adult friend/etc (which happens more than people realize), are responsible for taking care of their brothers and sisters or any number of situations?
Ultimately, the GPA allegory is a nice, succinct and cute way to wrap a simplistic argument, but it fails to comprehend the vast complexities of the world we live within.