Certainly that makes more sense than accepting the fact that some people are just not capable of more, and oh yeah SOMEONE has to do those jobs anyway, may as well ensure that those who are don't have to go on welfare to help make ends meet.
Here is what makes sense.
Just about anyone who isn't physically or mentally handicapped can bag groceries, dig holes or take movie tickets. Doing brain surgery requires a bit more effort and ability. Different jobs have different worths and different pay. A guy who owns a gorcery store knows that he will have a constant influx of new employees made up of teenagers getting their first job or housewives bringing in a little extra income. That is who he hires and he knows that he won't be handing any of them a gold watch after 30 years of loyal service. Minimum wage jobs fill a vital role in our economy, but they are a springboard. They are the kindergarten of jobs. It takes a lot to get from there to a PHD. You take a low paying starter job doing menial labor that any other person on t he face of the earth can do. If you do a good job, you'll most likely get a bump in pay. If you're really good and there are better high paying jobs in the company, you can probably move up and make more pay as they come available. Or you hear from your friend that the warehouse he works at is hiring and they pay $10 an hour and you go apply. The manager interviews you and looks at the work experience you've built up and decides to hire you. You graduate high school and because you and/or your family don't have a lot of money, you choose the vo-tech or community college. You study plumbing, HVAC, etc. or you take EMT training or get an associates in accounting. You find a job making more than your $10 per hour warehouse job you did as a kid. Then you lather, rinse and repeat.
Now tell me how it's the grocery store owner's fault that you don't take some personal initiative to better yourself over time.