It's an interesting but interlocutory piece. Nobody is wrong but nobody is right either, and it all turns out for the best... except it really doesn't. The author seriously downplays the huge political effort that was required to change living standard and grow wages; among other things, modern representative democracy was "invented" and violently forced upon the ruling classes, but it doesn't really get a mention (whereas slavery and socialism do -- probably because they feel like they've been dealt with for good).
It feels like the author is trying to sweep hard truths under the carpet of the last few paragraphs: "the problems [...] will naturally involve the issue of wealth distribution" and "such a world is likely to demand more than [...] incremental reform". Coupled with "Best to be prepared", it sounds like a call to batter up for an upcoming political storm, but it doesn't really suggest which "not-incremental reform" should be attempted, nor does it say anything about who should ask for such reforms and how.