Usually it leads to unemployment. People want to do the same things as each other, but we can't all be football stars. We can't even all teach kindergarten or nursery school, and the low pay of such jobs is the natural result of many people wanting those jobs. People enjoy getting BA degrees in psychology, then discover that they do not enjoy paying the student loans while working as unskilled labor.
Wait until you see what some 3D artists work for. Due to the fierce competition, many of them consider themselves lucky just to be working in their field of choice, and getting paid a minimal wage is just an added bonus.
