This is a very narrow view of an institution that almost all cultures developed independently of each other. A couple working together utilising each person's strengths massively improves the chances of survival and successful breeding. Even a bad marriage is generally preferable to surviving alone. With that the modern family can change the rules within the family to suit their circumstances...and for that you don't neeed rabbi's or legislation, just a good relatuonship.
In three days, Greek coastguard rescues 2,500 migrants (Reuters)
from the article: Israel should cancel the institution of marriage