Not long ago I was asked to speak to a religious congregation about widening inequality. Shortly before I began, the head of the congregation asked that I not advocate raising taxes on the wealthy. I had a similar exchange last year with the president of a small college who had invited me to give a lecture that his board of trustees would be attending. I'd appreciate it if you didn't criticize Wall Street," he said. It seems to be happening all over. A nonprofit group devoted to voting rights decides it won't launch a campaign against big money in politics for fear of alienating wealthy donors. A Washington think tank releases a study on inequality that fails to mention the role big corporations and Wall Street have played ... presumably because the think tank doesn't want to antagonize its corporate and Wall Street donors. A major university shapes research and courses around economic topics of interest to its biggest donors, notably avoiding any mention of the increasing power of large corporations and Wall Street on the economy. It's bad enough that big money is buying off politicians. It's also buying off nonprofits that used to be sources of investigation, information and social change, from criticizing big money. Our democracy is directly threatened when the rich buy off politicians. But no less dangerous is the quieter and more insidious buy-off of institutions democracy depends on to research, investigate, expose and mobilize action against what is occurring.