The main issue IMO will be that there will be undesirable males (70%) and desperate females (>35 age) without any chance for a stable partner (look at Japan, it

The main issue IMO will be that there will be undesirable males (70%) and desperate females (>35 age) without any chance for a stable partner (look at Japan, it's in full swing there; put your otaku into researching this ;-) ). Also, the system in that book is just a fantasy, a speculation how it could have been, not a historical fact. Biologically males are still naturally inclined to seek faithful, young and pretty virgins they don't share (despite cuckoo "education" trying to change that), and females seek the highest status/income/excitement males they can capture. This might be result of evolutionary algorithm at play over a very long period of time and it's unlikely this would change anytime soon, unless we have means to directly reprogram our brains for different rewards.