As a high income earner, I  would never consider forming a household with someone with a low income. Upon breakup or divorce with a low income person, you are saddled with a lifetime of spousal support payments. They might not like you, but they do get to keep your money. and as my lawyer pointed out when i was doing my will, even after you die your estate has to pay for them. so, naturally, high income men seek out high income women.