"The difference b/w a Boss & a leader; a Boss says; 'Go' a leader says 'Let's Go" E.M Kelly
These "people" get a thrill out of others' misery. Just as profiting off of someone's misfortune. They see someone else fail and it makes them feel superior. What underlies is insecurity and low self-esteem. Twisted really!
True in most cases... And for some people this is the only way to feel themselves strong & good enough - because if they got you fallen, they could lend a helping hand... sad, isn't it :(.