such a shift in demographics will bring a lot of difficult societal problems that come with emerging Middle Class who will want more housing and more freedoms
Social problems mostly 4:2:1 depedency ratios, i.e. elder care. Hence PRC pouring a lot of resource into this sector, but TBH unless automation catches up, they're just going to follow JP model - old people are going to be minimally taken care of, and simply die unceremoniously while most of workforce busy competing to pay attention. Helps that cohort is part of the incredibly poor with high savings rate, i.e. they are expected to take care of themselves and it doesn't take much too for the state to take care of them - perks of old before rich is old don't have rich expectations. Overall PRC is still resourced to increase QoL among poor old vs west trying to sustain onerous but expected social nets for rich old.
IMO housing will sort itself out if you consider reverse of 4:2:1 is 4 households / wealth transfers to the 1. Every married couple and their kids eventually has access to ~4-8+ housing units. Hence IMO even TFR will sort itself out once housing pressure / availability disspates by virtue demand decreasing due to less people. Of course transition can be very difficult/painful/messy, i.e. demand in T1/2/3 cities still going to be high, a lot of freed up housing is going to be rural, like all the abandoned villages in JP. Maybe remote work + cottage culture will finally pick up in PRC once most families inherit some rural land to chill on. TBH I can imagine PRC life being incredibly more relaxed once less people compete for resources.
As for freedoms, depends on which kind. I think most will be satiated with increased material prosperity / fully automated luxury communism meme conveniences. There's plenty of Chinese diasphora in the west jaded with western political process, and I wager that trend with continue with how things are progressing. Plenty of international students with first hand experience become more pro CCP. Ultimately people are going to decide if they want freedom to talk shit about unresponsive governments that get nothing done or crusing along in their self driving cars enabled by surveillance state.
And let's not pretend immigration driven demographic growth strategies are not bringing their share of social problems... in fact it's probably one of the largest sources of domestic instability being interrogated by such countries right now.
I've been all over China and it's true current generations are only all too happy to be rich and quite often obscenely rich.
They have very real understanding that all of it could be unilaterally taken away by the state at any time, so even if they flash their wealth they keep their mouths shut. At the same time many do buy in to state propoganda.
But what of their children who are born into comfort of middle class and are less materialistic and willing to fight to justice?
As they should, particularly the obscene rich who could not have possibly gotten obscenely rich without shady sheningans that _should_ get a CCDI visit. There's tacit understanding that phase of wealth accumulation is mostly over, and if you lie low, keep you mouth shut, behave, you can likely live comfortably but quietly enjoying the misbegotten gains from being fortunate beneficiary of "let some get rich first" period.
>willing to fight to justice
Over what? Peak covid19 lockdown brought a few white paper protestors and negligible shanghai libtard youths coming to the streets. IMO they're unlikely to experience that tier of adversity short of another blackswan event. Many of them are guanxied into comfy enough work opportunities with their parents nest eggs to coast on eventually. I don't really see any particuarly incendiary justice issues to fight over from this cohort except feminists/LGBT and related identity politics, but society skews old and conservative, those cohorts losing fight due to demographics for a long time regardless. They'll be even more quiet, because society is overwhelmingly indifferent to them. Which is not to say against, just not proactively endorse. And with cultural shift west is trending, there isn't exactly going to be a liberal model to follow without rest of country mocking them. Baizuo is a dying breed, west is increasingly not a place to emulate, especially when many international students and diasphora with experience in west is getting CCP pilled after experiencing western dysfunction, exacerbated by anti PRC sentiment.
Everyone else is going to be too busy with the grind like SKR and JP trying to fight for scraps with academic/skilled workforce inflation/overcapacity and eventually accept their lot in life for being statistically mediocre. This is probably where the real discontent will swell, fighting for their share of more materialism. And IMO that's partly why CCP focus very hard to indigenize everything and embrace material model (i.e. not pure profit) of industry - they want be able to drive cost of everything down so masses can buy $20,000 cars that's comparable to a $60,000 car - there's still a lot of headroom of satiating masses with nice things.