I think it's worthwhile to catch up to the many years of reporting and documentation on this topic:

https://www.theglobeandmail.com/canada/article-life-in-the-shadows-inside-the-world-of-torontos-undocumented-migrants/

Toronto’s undocumented migrants – most of whom initially entered the country legally – grapple with substandard employment

https://amnesty.ca/temporary-foreign-workers-report/

Exploitation, discrimination and abuse are integral features, not bugs, of the Temporary Foreign Worker program

https://www.cbc.ca/news/canada/toronto/migrant-workers-rescued-york-toronto-1.6767167

A single foreign worker blew the lid off a massive international trafficking ring north of Toronto, police say

https://ijb.utoronto.ca/news/this-is-the-new-slavery-migrant-farm-workers-underpaid-abused-and-injured/

'This is the new slavery’: Migrant farm workers underpaid, abused and injured

nearly 80,000 migrants worked in agricultural jobs under Canada’s Temporary Foreign Worker Program