I wouldn't call what the young people lying flat in china "rich enough". There are stories of people in their 20s and 30s, after college or after layoffs, that they've either got a few thousand dollars saved up or from family. They couldn't find any jobs due to ~70% youth unemployment rate. Or they don't want to work in factories that pays out $2/hour and waste their degree. So they are moving to very remote countryside and renting a room for $50/month, and spending only $.50 a day. Or live off of parents, what's also known as 啃老族 or eat the old.

Remember the previous Chinese premier confirmed there are 700 million people living off less than $100/month a few years ago. so this living of standard is possible for young people. Especially now that there's widespread 50% reduction in wages/cost of living in China.