U of O Will Pay Cash to Get Rid of Grad Students

I just read in the BMI bulletin that U of O will be offering cash awards to grad students based on how fast they complete their degrees. Top prizes are $1500 for MSc thesis submitted in 2 years or less, a cool $4000 for PhD thesis submitted in under 4 years. I can't for the life of me figure out what purpose this will serve. Although it will be a nice little treat for people doing the pre-professional school/mid-residency rush science degrees. Anybody?