I don't have proper numbers, but basically the lost a bunch of IC but gutted their education system for the spare change to repair enough damage so that they are still ahead of you. Like, they lost gobs of SoL and a big chunk of their IC, but they were far enough ahead on both of those that even after those losses they still have a stronger economy than you, and once they pat that out they will be back to pull ahead of everyone else as quickly as they possibly can.
Part of it is that because of the long delay before the meltdown they had a lot more time to build momentum and get further ahead than if they kept getting knocked back like they usually would, and during that time they invested a lot in business techs that helped a lot here.
And of course, I imagine that they can just buy their Education back up, because there are never consequences for plundering the future to pay for the present as long as you have enough money, right?
I mean, logically speaking, doing what you've suggested they do
should have led to a revolution, because people who have an extensively high SoL suddenly tanking it is going to hurt--especially considering that the only real way you can justify the extreme industrialization that you're suggesting the Sketch have (To the point of being better than
literally everyone else combined apparently) is if everyone can pay for enough trinkets to justify the suffering.
I mean, I'm not saying that this is straight up impossible, but it probably shouldn't have been obfuscated if Sketch could outproduce the rest of the world
combined, which you're suggesting they are to be able to afford the solution you say they executed. It should have clearly stated "Greater industrial development than everyone else in the top five combined" in that state, as such a detail
probably shouldn't have been missed.
An economic crash in a pre-communications world shouldn't have been recovered from as quickly as the Sketch did, not with the government style they had, not when theoretically, they should have had to cajole every individual factory baron to play along with the scheme.
Unless the problem here is that they could just constantly raise PW and hang onto a massive stockpile to whip everyone into submission in a crisis--which again, isn't how governments work, but eh.