To all the people who think this was normal in the 80s, I have to tell you it wasn't, and this sounds very harsh to me.
My kids were born in 83 and 86, yes smacking was more common than now, but I never arranged punishment for a later time, that is emotional abuse bordering on torture IMO. I never ever used food deprivation as a punishment, and I don't know anyone who did either of those things to their children.
I never said wait till your father gets home, that's just another way of emotionally abusing your child, and ruining their relationship with the other parent as a bonus. If I needed to be the bad guy, and sanction a child, I did it when it needed doing.
I would not wash my children's mouths out with anything, and I only heard of one mother doing that to her son on one occasion. And it was generally condemned in the school gate gossip as abusive at the time.
I must admit, my MIL thought I was incredibly soft on my kids, and spoilt them, but they were generally very well behaved.