Corporal punishment is banned in many countries, such as New Zealand, Sweden, Germany, Portugal, Ukraine, Israel, Denmark, Brazil, Kenya and Congo, amongst many others. These nations don't seem to have a particular discipline problem amongst their children, so I don't see why more countries wouldn't legislate against a behaviour that is clearly not better than other discipline techniques, and is also known to have plenty of negative effects.

What is everyone else waiting for? This research reported has been consistent for over two decades — nothing is going to change through waiting, except that more children are harmed by their carers' behaviour towards them.