[Slings and Arrows]

They also tend to make less money than their heterosexual counterparts, which may account for some health care discrepancies.

This may be a little deceptive - it was my understanding that homosexuals / lesbians tend to have more disposable income that heterosexuals, presumably because they rarely raise children.

[annalex]

have more disposable income

Both can be true: make less money (who would want to have a gay co-worker?) and have more disposable income due to the lack of children, as you noted. But when the researcher says that the lesser income may account for worse health care, that is possible since in our system health care is paid for by employers.