Bill Gross

The wealthiest and most privileged in the U.S. should be paying more taxes, according to Bill Gross, co-founder of Pimco and manager of the world's largest bond fund.

"Having gotten rich at the expense of labor, the guilt sets in and I begin to feel sorry for the less well-off, " he said in a client note on Thursday. "The era of taxing 'capital' at lower rates than 'labor' should now end."