FIRE is legal. You’re allowed to apply and interview for jobs and quit when you want. You can switch jobs if you like.
The problem is that the average salary is really low. In Shanghai, which is considered a wealthy city, most of the young people graduating from college make around 5000 rmb per month, which translates to approximately $800 per month. Even when you’re saving 80%, it doesn’t get you very far very quickly. In addition, I don’t think they have index funds here. Most of my friends are either putting the money in high interest bank accounts, which are considered “safe” investments, or else you’re investing in stocks or peer lending. One friend just lost the equivalent of around $20000 USD on a peer to peer lending platform, which isn’t well regulated. I don’t know if regular folk have access to index funds or mutual funds.
In addition, it’s crazy expensive to buy a house, and if you rent, over the last few years, rent has gone up by 10-20% per year. (it’s finally starting to stabilize, which is nice.) It’s not necessarily a good environment in which to stop working because the future is kind of uncertain.
Also, healthcare is subsidized but it’s not free. You pay out of pocket for treatment. And if you don’t pay, you don’t get treated. They will turn you away at the hospital doors. As long as you don’t die in the hospital property, then they are not liable. I had a friend whose very pregnant and suicidal sister was turned away at the hospital because they deemed her to be too big of a liability. But anyway, the possibility of unforeseen hospital expenses for yourself or extended family members means that in general, able-bodied family members often choose to work to stockpile money in case of emergencies.
Finally, the government does state that you need to work for a certain number of years (I heard it was 15 years) to qualify for the state pension when you retire.
Those are just the financial considerations. I haven’t even started to broach the topic of societal, cultural, and ethical considerations of filial piety, etc. and how those may impact decision to save and decision to FIRE.