I only work a few hours a week and I don't earn much, it's true.
But, the reason I'm able to do that is not because I married a big earner. DH works hard and earns a reasonable wage, but nothing exceptional. I was the higher earner before DC.
The reason we live like we do is because I had a flippin' good job for 15 years, because I managed our money so that we lived well within our means during that time(DH would have spent everything) which means that we don't have a mortgage or any other debt and that we have savings and investments that mean we can manage quite well on one fairly ordinary salary.
Also, of course, there's the old story of the fact that DH can only do what he does because I have everything under control at home.
I know we're very fortunate but I have and do contribute just as much to our financial situation as DH does.