I've heard quite a lot of discussion about ethical screens and so on in your previous testimony. Consulting firms are profit-driven, and we cannot expect them to put in place effective ethical screens. It's just not part of their mentality. They may refuse some contracts on the basis that there's too much reputational risk, but that's purely defensive; it's not in order to protect the public interest.
The other point I'd make is that the government's own consulting screen is something that appears.... Heaven and earth get moved to avoid it from working when there's a situation like SNC‑Lavalin and it might actually kick in and cause consequences for a Canadian company.
I would think that ethical screens are pretty weak on both sides. I would also say that the most important screen you need is one around competency.