How much training (if any) have those in the management had to become managers?
I saw a statistic a couple of years ago which said that over three quarters of managers in the USA had had some form of management training. In the UK only ONE quarter of managers had been given any management training. QED
The corporate culture comes from the top downwards and companies which resort to bullying tactics will often, in my opinion, find themselves out of business or taken over in the long term.