My dads financial situation

My dad is the only one that works to take care of the house and the family, he pays for everything, works 2 jobs. My older brother is 20, works but doesn't help my dad out which hurts me a lot, he says how he has very little money and says that my dad has more money then him?? Why the fuck would he say that, you cannot be saying that and then buying/ordering the most expensive shit ever instead of helping out dad. Why cant he just help dad out just a little bit?? What the hell is wrong with him. I'm hurting inside seeing my dad come home from work very tired.. I'm always worried that he'll give up one day and he won't want to work anymore, I want to help my dad out so bad but I can't because I'm in college, first year college as an 18yr old, it hurts so bad, he always tries to put a smile on his face when he's with us, when I ask him how his day was at work he says it was amazing/wonderful but I know he's tired and he's lying, I'm hurting inside so badly it hurts my heart so much, why doesn't my brother understand. Once I get paid next semester from osap I'm giving most of my money to my dad, he needs it way more than me.