Sure, and I think that for those who view cultural homogenity as a particular concern, they have two options: (1) accept that, in order to have a culturally homogeneous society, birth rates need to be at the replacement rate at least (and, given that the UK birth rate is well below the replacement rate, this requires (among other things) making it financially easier for people have larger families, or (2) accept that societal collapse is inevitable but slow the pace of it by slashing public spending, significantly increasing taxes (rising exponentially over time) and significantly raising the retirement age. When presented with those two options, I think most would prefer the first option if it can be achieved.
Making it more affordable for people to have larger families is not a cure-all, though. Women in particular are still choosing to have smaller families- likely due to career aspirations. Balancing out maternity and paternity leave would probably help (so that women are less disadvantaged in comparison to men) but again, I don't know if it's enough.