Earning a lot of money is not necessarily 'privilege'. Earning a lot for doing very little certainly is, but arguably that's not the case for these interns - I would guess that they justify their salaries by providing considerable value to their employers. The fact someone is an intern is not a reason to pay them a low wage.
Rightfully so, since on average interns in Silicon Valley produce products worth paying for (software), while interns on Wall Street do... what exactly? Learn how to wrangle the market?