US President Donald Trump's policies in particular spurred the fortunes of the ultra-rich, which jumped 16.2 percent in the first year of his second term to $18.3 trillion, Oxfam said in a report released each year ahead of the Davos forum.

As it flagged billionaires usurping the political landscape globally, rights group Oxfam on Monday cited India's reservation system as a "compelling" example of progress on how ordinary people can be politically empowered.

As the rich and powerful from across the world start filling snow-clad lanes here, a new study said billionaires are 4,000 times more likely to hold any political office than ordinary people.