I think Pierre's goalpost moving is stupid and I don't agree with him but he's saying that it be converted to cash and then reinvested so that Carney doesn't know what's in it.

Handing your existing assets to a trust, you don't generally expect them to randomize your entire portfolio, so of course it'll be similar to what you put in at the time you get it back

Nobody else has ever been expected to do this and it's a bullshit bad faith argument, but that's his reasoning