[When asked: Do you know of any examples where a few slaps have saved a marriage a created a happy home?]

First of all, you have to look at all the possible choices you have with a wife who neglects the kids, no meals after you come from work etc...
1) Divorce her
2) Stick with her
3) Hit her

[...] I would pick 3rd because this can avoid the divorce and also being with her won't be so bad. But again, I can't emphasise enough that this is in extreme cases; when confronting her and when giving her "incentives" to act her part. If this fails, you are left with 2 of the 3 worst choices.

[...] my parents have both hit me and I love them unconditionally, alhumdillah. And I sometimes feel good that my mother "knocked" some sense into me. I know the relationship between spouse and parents and children are different but I can't believe that love simply cannot exist after you hit your wife.