I've done low-paying jobs like that and white collar jobs.
The low paying jobs are way, way harder.
Your argument that this portion of the workforce doesn't deserve to make enough to live on seems to show that you don't really know what actually makes up the world economy.
Being a cashier at McDonalds, or a dishwasher at Applebee's, are NOT careers that should provide a living wage. -- What is the basis for this?
"If you want a living wage, get a better job" is a fascinating way to spin "I acknowledge that your current job needs to be done, but I think whomever does that job deserves to be in poverty."
The issue here involves NON-SKILLED jobs vs. SKILLED jobs.
It is not about "low-paying" jobs vs. "white collar" jobs.
There are millions of non-white collar occupations that pay living wages...
Carpenter, plumber, electrician, welder, HVAC, real estate agent, insurance salesperson, equipment operator, farmer, small business owner, hairdresser, truck driver, ect.
Do you really think the pay rate for mindless, no-skill jobs should be comparable to the occupations noted above?
A person bagging groceries is bringing no skills to the table and providing very little value.
How could you possibly justify paying this person ~$50K year?
That type of job is not for someone to support themselves on. It's for a part-time high school or retired/disabled person.
If you people insist on grocery baggers being paid that much, then that position will no longer exist.