They choose to live on part time income. You can have roommates which greatly reduces your cost of housing. You can eat "steak and lobster", or "rice and beans". Not everyone buys streaming subscriptions, and not just the Amish are doing without.
I wouldn't choose most of the above either, which is why I have a full time job.
I wouldn't choose most of the above either, which is why I have a full time job.