They would only need one work permit, then. Is that what you're saying? Once they've been approved to come here to work from whatever their country of origin is, then they will only need that one work permit and they don't have to renew it after they've completed their two-year work requirement.
Evidence of meeting #154 for Citizenship and Immigration in the 42nd Parliament, 1st session. (The original version is on Parliament’s site, as are the minutes.) The winning word was finance.
A video is available from Parliament.