If more kids were spanked with belts, we'd have a lot less disrespectful screaming ****ers running around.
It's simply not possible to draw the line between discipline and assault when talking about physical implements like a belt. If you can't get your message across using just your hand then using a belt won't work either and all too often it's used to by the parents to feel powerful rather than doing what's best for their kid. I, like most people in the UK, was never beaten with a belt and I've never been in trouble with the law, nor have I been involved in any fights. Needing to use a belt shows that you've failed as a parent.
Rather than such stone age thinking we should be looking to the real
issues - the failings of the education system, a culture that values possessions above deeds, addiction, social deprivation, a lack of upward social mobility, a society fearful of standing up to wrongdoing, a legal system that penalises common sense, etc. The idea that parents beating their children with belts would improve society is frankly ridiculous.