You could build an app that blocks scammers or a service that connects scammed people and pursues class action lawsuit to help them. You could also scam scammers themselves. You can recognize before other people that a company is a scam instead of the productive business it pretends to be and get rich by shorting it or gain fame and influence by proving it to the rest of the world.
I think the general message of the quote is that if one believes that they see the world much more accurately than (almost) anyone else, and yet they do not use this supposedly superior knowledge to make their own life better, they are actually not smart, but losers shifting blame.
“Yet, Japanese wages are (on a per-hour basis) much lower than US ones, and I think that’s largely because the management culture is overall even worse than in America. (And partly because of some large-scale embezzlement from Japanese corporations involving corrupt contracts to private companies, but that’s beyond the scope of this post.)”—this is the first time I hear about this. Could you please share some information regarding why you think this is the case?