The report found that the number of people in the world with more than $1 million to invest soared to a record of 12 million in 2012, a 9.2 percent increase over 2011. The aggregate wealth of this group hit a new high, too — $46.2 trillion — a 10 percent increase over the previous year.
What is particularly striking is that even within this rich group, the very, very rich are doing best of all. The ranks of the ultrarich, whom the report defines as people with investable assets of at least $30 million, surged 11 percent, an even greater rate than the mere millionaires. This small sliver of the global population — 111,000 people — accounted for 35.2 percent of the entire wealth of all the world’s millionaires taken together.
What are the winner-take-all forces driving this extreme concentration of wealth at the top? One explanation was offered earlier this month by Alan Krueger, the Princeton economist and departing chairman of President Barack Obama’s Council of Economic Advisors. Drawing on his own previously published academic work, Krueger used the economics of what he calls “the rock and roll industry” to illustrate the forces more broadly at work in the world economy.