Canada’s open secret: International students are here to be exploited

I'd be interested to know more about this. I don't doubt for a second that international students are being exploited in the labour market. However, my personal experience of international post-secondary students has been with university students in Toronto and Halifax, and they were generally much wealthier than their average 'domestic' counterpart. I wonder how much pressure to seek paid employment among international students varies by student demographics, urban/rural study site, province, college/university, fields of study, undergrad/grad. I think it'd be possible to better characterize the international students most susceptible to labour exploitation