i'm not exactly sure what carney wants or expects the private sector to do in publicly owned airports. i suppose he may want them to take over hiring, or may operate a tim hortons. the argument is that this is good for canada because you can tax it. but you're taxing profits, so it would inevitably be
better if you owned it, given you already own it.
it's going to cost a lot of money to sell it, to start. you have to pay lawyers, for example, and they charge a lot. then, you're going to take a percentage of the revenue you would have had 100% of if you had kept it. so, you're going to throw away 95% of revenue, or might even lose money. on it's face, it doesn't seem to be very smart.
what it is is a reflection of the tired old argument that the private sector is "more efficient". this was at best an assumption in like 1975. since then, it's been repeatedly proven wrong by dataset after dataset. but homo economicus is continental and theoretical, it's not analytical or empirical. it relies on theory, not data.
one example is outsourcing hiring, which is probably almost the only thing that a private sector could do in an airport while retaining public ownership. there was a time in the 80s when outsourcing hiring was supposed to save money because the private firm was supposed to be more efficient. then they actually tried it and learned that the opposite was true - the bureaucracy in the private sector infrastructure was brutal, the corruption was rampant and you had to pay the ceo and this whole other layer of management, while you really didn't replace any government workers. the result was that the frontline workers saw a paycut, which was recessionary, overall and the costs still doubled or tripled. it turned out to be the most inefficient, trickle-up policy proposal you could imagine, if you tried. it was a massive transfer of wealth from government workers to private sector ceos and bourgeois service workers like accountants and lawyers.
i don't imagine there's actually much that a private sector investment could really add to an airport that the public sector couldn't do for a fraction of the price.
the messaging is that carney may have been blocked by the ministry. if that's the case, i hope that data wins out over ideology, after they have their debates, which are healthy and encouraged.