In a non retarded nation UBI would be used to incentivize high IQ whites to make babies (although this is now questionable because as Aeoli pointed out this kills intrinsic motivation…)
(so culture is still the only answer whodathunkit)
I’d like to point out I’ve already addressed this:
The women like stress more than anything. Nothing matters to them except seeking novel sources of anxiety. Sexually, they are either frigid or sluts, depending on whether they can relax. They can be convinced to bear children if it can be viewed as a personal challenge or self-actualization.
White women make lifestyle decisions to maximize virtue signalling. They virtue signal according to the moral prescriptions of the ideology of the men whose eyes they want on them. They decide which men they want based on the Metcalfe valuations of men’s social networks.