The Westward Migration was very rough and hard to get through on your own. If you ran out of food, you had to find more food before you died of hunger or thirst. You also had to find shelter and warmth otherwise you would either freeze to death of starve to death.
One of the things i would argue would be if they did not work more than 40 hours a week then the children could go to school and see their family and have a good life instead of worrying about work. Another thing is that they are grateful they just need some time to relax instead of being overworked.
Child Labor,
children should be in consideration because if you over work them they could possibly just shut down physically, emotionally, and mentally from working to much. try putting yourself into the children's shoes for once and see how sad and mad for working so much and not being able to see their friends and family that much.