Why did Quebec exclude a cheaper stadium solution?

La Presse’s Vincent Brousseau-Pouliot writes that Quebec chose to exclude a solution for the Olympic stadium that would be far less expensive than the $870‑million contract that was signed recently for a new stadium roof.

The solution, proposed in 2012, would’ve removed the roof entirely and winterized the interior, although it would mean accepting that no events could be held in the stadium during the winter.