They can furlough, but it will come at a much higher than usual price. They'll never see 90% of those people again. It'll make recall quite a conundrum.

They've never furloughed, they've only watched furloughs on the pax side when all of the pax carriers were bleeding simultaneously. In this case I'd say to management that this doesn't work the way you think it works. All they will do is lose a bunch of sunk costs, never to be recovered, and then end up hiring again in a market where they're the ugliest suitor in the room.