Legitimate point: Earnings mean almost nothing unless you are making seven figures. Also, even if you are earning six figures you're probably still spending close to half your income on housing like a moron. The only thing that is actually important is how much (by which I mean how little) you are spending on housing and food which are the two biggest expenses. If you can save $600-700/mo
every month it does not matter what your income bracket is, you are winning but still not beating the master race. You will never catch up because they were born into it and already have stockpiles of money set aside working for them while they do nothing but babysit it. The best chance you have of class mobility is through extremely diligent work creating your own business while living in a hut and eating ramen for a decade or two and being a fucking hardcore badass which just isn't everyone's cup of tea. Then you can enjoy your wealth for a few years in your old age until you die and your progeny inherit your empire, giving them a leg up, assuming they also have the ability of not being a huge dumb dumb and ruining your life's work within a few years, which is pretty likely.
TL;DR: If you weren't born in the upper class, get comfy or kill yourself for your children. The world is a dumb place.
Social Mobility sometimes moves down rather than up so you know, don't get too comfy either.
http://www.economicpopulist.org/content/youre-born-it-america