Well yes.. we live an alternative lifestyle I suppose.
As for wealth.. I can't speak to that but we look out for each other and there are several families I know who do not have that kind of support.
> live a more modest lifestyle than their peers.
you mean are less greedy than peers.
I'm guessing those families are not living the conspicuous-consumption that has been the "new-normal" for decades now.
I'll note that it's easier to have a single-income household when you're inheriting a house from grandma, or if dad will help with the deposit for buying a property. However, if both partners are from low-/no-wealth families, they will find themselves forced to get their career on track and/or live a more modest lifestyle than their peers.