Yes, not sure I fully understand some people's aversion to a privately managed/owned/operated transit project, when it has been done over and over again in other parts of the world.
And to be fair, CDPQ represents the vast majority of QC's population, being the public pension fund manager for all public and private employees on payroll. So, not exactly a "private" corporation.
If we left this up to STM or ARTM or the provincial government, it'll likely take a few more election cycles (if lucky) to get any major infrastructure projects off the ground. We have more than ample proof around the country for this recurring cycle of foot dragging - over studying and over engineering just for the sake of it - on projects solely led by the public sector.