Its pretty clear why Matt Goodwin (ReformUK Ltd) is arguing that women should have more children!
As migration approaches net zero in the UK, and the population continues to age (and the replacement rate for births is no longer achieved), if ReformUK's migration policies are not going to further damage the UK's economy (by reducing the available workforce), there needs to be a radical upswing in the birth rate.
Women are just social birth machines for Goodwin & Reform.