You're missing the point. All you've done is list jobs where the same sweatshop mentality has already taken over and used them to justify not helping another group. Dissing the job they do or their reasons for being there as if it's beneath you is also not really an answer, just you venting your dislike for a certain sector of the labor force....if we were to use your argument we could ridicule just about any job.....
Receptionist: Good morning (............)'s office how may I help you?
Supermarket checkout worker: Beep........beep.........beep.........
Train driver: Go forward......stop........go forward........stop
Fact is, the main reason for taking a job for the vast majority is that they're doing what they're forced to do in order to get money to live. Making fun of their skill level is just cold and ignorant in my opinion and again we could all be the target of that in the relative world of labor skills. The vast majority of us wouldn't choose to be working 8, 9, 10, 11....or in my case 14 hours a day just to get the bare necessities of survival. We're forced into that position by a corrupt banking oligarchy that has structured the worlds finances to make us all completely dependent. Low wages equals control.
Yeah. Don't get out of the classroom/lab too often don't you? The aforementioned jobs are capable of paying a higher wage because the product or service is of HIGHER VALUE. If your product is a $5 burger and you want to pay your order taker/greeter 15/HR how many burgers an hour do you have to sell just to PAY this person? How many burgers an hour do you have to sell to pay for the materials (food for order)? How many burgers do you have to sell for utilities to cook the burger? How many do you have to sell for the building, taxes, maintenance costs etc., etc., etc., of the building? How many more burgers an hour do you have to sell to pay for all the other employees? Do you pay the cook the same as the order taker? Do you pay the Assistant manager the same too? What about your profit/salary?
Secretaries often start at 28K a year because the company produces a product which can absorb such a salary. Secretaries and Legal Aids, para-legals often start in the low 30's at many big law firms. Again, want better pay -- get a job which will pay better. It doesn't work the other way around.