If that’s the necessary tradeoff, of course you’re seeing failure of adoption.
Also, would they need to move every time they change jobs (or husband & wife can no longer work on opposite sides of town to continue their careers from before marriage)? Logistics need thought through to be feasible policy.
Nothing will change except the climate and then the "husband and wife" can make a rational decision about which of them gets to consume which proportion of the hugely diminished resources. Perhaps the "husband and wife" will regret the recently-vanished mild and predictable climate to which humans spent tens of millions of years adapting. Probably not though: the "husband and wife" are great at not looking physical reality in the eye.