From Cy Twombly to Robert Rauschenberg, artist foundations have been seeing a high number of internal turmoil, as trustees and advisors lob claims of unpaid compensation, outlandish salaries, and nepotism that place the foundations’ ostensibly noble missions into question.  “The private foundation world is a wild, wild west,” said Trent Stamp, founding president of Charity Navigator, which evaluates nonprofits. “There’s an opportunity for great abuse.” (more…)