You don't understand what middle class is. Middle class is not a specific dollar figure. It's not owning a large TV. Middle class is when you don't have the set of anxieties that cloud your judgement and depress your day.
Middle class means you don't care if your paycheck gets delayed from Friday to Monday. Middle class is when you don't have to count how many times a week you go to the laundromat.
Sadly, middle class, as evidenced by these responses, also means that you don't see why other people would care if their paycheck gets delayed by a business day or two. It's no big deal, you are convinced. Yet, there's a woman that just started working, waiting for her first paycheck, which already had to be delayed due to starting date not aligning with payment schedules. And she has been planning to pay rent with this money, on the promised date. And yet, because some upper-middle-class manager with middle-class myopia forgot to submit everyone's timecards on time (as required by the similarly-myopic corporate policy), everyone's paychecks get delayed by a few days, including this woman's. Now she has to deal with missing paying rent. True story, in modern liberal bastion of Massachusetts.
All you have to do is understand why it's considerably more difficult for someone to improve their life, when starting from a much lower point, constantly being banged around by the ankles of the society.