Employ the students while they learn and have them work it off.
They will have to work while they are student anyway, unless mommy and daddy pay their way through.
Stop hiring anyone but enrolled students (until all menial positions are filled) to take care of things in colleges and universities and places that help colleges and universities.
Then allot them credit points they can spend on credits as they work at the college and universities and places that help colleges and universities.
All of these places need upkeep, have the students upkeep them while they study in their chosen fields.
They will have skin in the game from day one and will care more about their place of study instead of partying away their time there.