International students already get bonuses to points. They get 70 or 80 points for Canadian work experience, and lower experience requirements for education or foreign work experience. They have an easier time getting jobs, being exempt from the LMIA process and permitted to take a job that a Canadian would already hold. They don't have to get an ECA, either. Being physically present in Canada, it's easier for them to get an LMIA, and on top of that they don't need proof of funds.
The deck is already highly stacked in favour of international students, to the detriment of (often more qualified) foreign workers. As far as Canada is concerned, a foreigner is a foreigner - why turn away qualified, skilled foreign workers (particularly those who can get an LMIA), in order to have a recent college graduate, who often is just barely starting their career?