cherrybim-
I agree 100%.
No one is forcing them to take the job.
You can also look it at another way-
How much would you pay to have full time supervision of your teenage child? Being in a structured environment with three tefilos a day (for your son), learning, three nutritious meals, while surrounded by their peers and given responsibilities that help them mature into adults.
Now to think that not only do you not have to pay for this but they also earn some spending money- I think it’s a great deal.