"According to Oxfam, the world could see its first trillionaire in 25 years if the superrich continue to benefit from the “highly secretive industry of wealth management.”

There might be many shady types of people among the super rich. But the reality is that there are also many hard working, industrious people among the rich who have taken some risks and worked for what they have.  Rather than take away the wealth of the elite, I think the answer is to ensure that they pay their fair share of taxes as them accumulate their wealth. 

Property rights matter. You can't just take away the assets in order to make it a more human economy for all, or tax away the benefit of accumulating wealth. Wealth is mobile and it will move.