Interesting idea but I think setting the mark at the 7 Year Itch is a bit risky. Ten years makes more sense and even then I am not convinced. It also puts children at risk as after a few years of marriage both partners (but especially men who can blame it on evolution if they want ) start to think of life in greener pastures. Marriage as a contract protects the financial interest of stay-at-home moms and the children dependant on the economic security provided by the working father. This is not in every case but it is an average.
Before some limit is set on the marriage contract, econmic considerations for the stay at home spouse or spouse earning less who is also going to be taking care of the children (most often the woman)... should be made and a support structure implemented.
In a country with an already declining birthrate and terrible childcare options for working parents...and idea like this is romantically idealistic but economically down-right stupid. It's putting the carte before the horse.
as after a few years of marriage both partners (but especially men who can blame it on evolution if they want ) start to think of life in greener pastures
This statement is probably going to draw some dissent. I base my statement on the numerous articles, books, interviews, personal examples, etc..etc..etc..that I have been exposed to. Whether it be Freud, Jung, Sociologist of the 90s, Women's magazines, Playboy or my colleagues... I understand that this statement is not true for every human being.