Because you can go somewhere else and take home more. Humans are constantly dissatisfied with their situations and seek continuous improvement. This causes a l

Because you can go somewhere else and take home more. Humans are constantly dissatisfied with their situations and seek continuous improvement. This causes a lot of friction but it's what breeds innovation. The "why can't you just be happy with what you have?" argument applies at all levels of life. You could take this same argument from the bottom of the class hierarchy all the way to the top and it still won't stop humans from wanting more. This is in fact the same mental mechanism that enabled us to climb _from_ the bottom. You can't just turn it off no matter how high you climb. I speak from personal experience climbing from working in fast food, warehouses, construction then to white collar IT leadership positions. I can't turn off the drive to be better no matter how good things get and I don't want to because it's the core of how I survive. Just my $0.02