Working at McDonald's is already economic suicide. Unlikely that they're worse off now unless they are unemployed.
https://www.epionline.org/minimum-wage/minimum-wage-teen-une...
It's why you might have a house full of teenagers now, but the mother has to shoulder the entire economic burden while they play Xbox or cause trouble. Pricing people out of jobs and thereby denying them mentorship opportunities and people skills does not leave them better off.
You're better off taking that time and putting it into learning something, anything, than to work 8 hours a day for less than $40 in wages. You're essentially asking lower class workers to be unpaid interns when you pay them that low, but there is zero benefit to being an unpaid intern in mcdonalds.