It would be odd, if they considered them incompetent to ask them to come into fix the situation the other contractor had created don't you think?
Honestly, given the way government bids work, and the corruption involved, I'd think any contractor would be highly nervous of criticizing procurement, at all. Do you find the procurement officials to be credible? I suspect that you can find "disqualifying" factors with respect to any of the bidders if you choose to do so. What assurance do we have with a partial disclosure that other bidders aren't equal or worse? I do take your point, that a salty contractor also may have an incentive to be critical.