Signaling that you expect your mate to be frugal might not be a widely applicable strategy for attracting one, though…
If you're frugal yourself, it might be a signal you want to send if you want to improve the odds of a mate who won't drive you crazy.
It may be true for you. I doubt it's true for me. And most importantly, I doubt it's true for the average male. Hence not much of a surprise that people aren't going around signaling frugality and trying to support a family with one earner on a relatively low income.
Dalrock writes an interesting article related to Dr. Helen Smith's book the Marriage Strike. I really have to bump it up on my too rapidly growing reading list. (^_^)