He has mentioned being very aware of the difficulties of the election campaign and now him being PM for his children. If he was so concerned about them, maybe now wasn't the right time to go for this role. Instead he went for it, putting his own ambitions before his concern for his children, so he'll just have to deal with the public's disgust about him doing stuff like this.
I'm not sure why anyone would be shocked at a politician doing any of the stuff reported. As much as he tried to present himself as mr average person by going on about his parents normal jobs etc, he's far from it. He is not interested in helping anyone, he is as self serving as anyone else.