One associate said Koch had confided that he gave away approximately 40 percent of his income each year, which he estimated at about $1 billion. This of course left him with an annual income of some $600 million and considerably helped ease his tax burden, but he enjoyed the role, a family member said, in part because it bought him respectability. There was another side to his spending, however, that was then still largely secret. While David was happy to put his name on some of the country’s most esteemed and beloved cultural and scientific institutions and to take a public bow at the ballet,
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