We have more singles, more childless couples and more single parents. Their housing needs are not being met. We expect young single people to rent an apartment designed for a family and get roommates.
If that works for you, that's already available. The assumption that someone with basic income should get a roommate is an assumption that they really aren't allowed to aspire to the same things as middle class people, like a space of their own.
A lot of women currently de facto use a romantic partner as a means to cover rent and it causes all kinds of problems. Expecting people to pair off to have a decent place is essentially expecting a polite form of prostitution.
What it really boils down to is that an average middle class family in the past had a full-time housekeeper. Typically, those housekeepers were single women. Nowadays, that same demographic group has kids of their own. I wouldn’t call it prostitution so much as pragmatism.
Which then puts you into a situation where your financial and housing security is dependent on a relationship working.
No thanks. That's not a nice incentive.
Is this really the demographic that should be optimized for? Seems there's a nice financial incentive to find a partner and split the cost of rent. As a single childless person myself (who has shared rental houses with a friend for several years now to lower costs of rent and keep it "affordable") I've been led to believe that the cost of having children amortizes (especially as you add more children) with incentives, and really pays off as you get into old age. If it were up to me I'd rather optimize for the family unit rather than singles.