Only middle class professionals have "a career" and therefore deserve to have enough money to live on, don't you know.
It's the primary reason we don't need a minimum wage - working in the service industry or any other relatively unskilled work isn't "a career" so it doesn't matter if it only pays 2 bucks an hour, so goes the reasoning because nobody should be expecting to do it for long or make a life out of it.
It's myopic.