It is literally in their mission statement.
https://www.budget.gc.ca/2021/report-rapport/p2-en.html
"The Government of Canada intends to propose amendments to the Immigration and Refugee Protection Act to provide the Minister of Immigration, Refugees and Citizenship Canada with authority to use Ministerial Instructions to help select those candidates who best meet Canada’s labour market needs from among the growing pool of candidates who wish to become permanent residents through the Express Entry System."
- Streamlining Express Entry