Q&A: Famed economist Henry Kaufman says robots are 'greatest challenge' to workers

The S&P 500 is up 21% since Election Day. Henry Kaufman, 90, the renowned economist, former managing director at Wall Street firm Salomon Brothers and author of Tectonic Shifts In Financial Markets, shared his views with USA TODAY on the future of the American worker, tax cuts and the middle class, the retirement savings crisis and the risks facing computer-driven markets. Kaufman is president of Henry Kaufman & Company, an economic and financial consulting firm established in 1988. USA TODAY: Robots are invading the workplace. Is technology a threat to middle-class workers? KAUFMAN: The greatest challenge that workers face and we as a society face is that labor over a longer period of time will become more and more obsolete.