Yeah, I see this as mostly a correction of the wage gap -- compared to women, men as a class have historically pursued money over things like creature comforts, social status, personal safety, and time with friends and family. This is what correcting that trend looks like.
Wait, do you mean that less pressure on men to provide is a result of a declining gap?
If so, I think some people are mistakenly parsing your statement as "child support is a method of correcting the wage gap". I myself parsed it that way at first glance.
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. (^_^)