comment: Every couple is different and they should decide between themselves the financial responsibilities. 
  You do you, I hope you find someone who agrees with you. I think your financial distribution is reasonable, but the premise that all couples should do this is not. It also ignores things a person may value independent of their partners income. For example if you do percentage split on groceries, but she does all the cooking is that fair? Should she charge you a rate for cooking? How about child care? You could quantify these things in dollars but it's going to get complicated.