NEW YORK, NY -- Starting this fall, and well into the future, medical students at New York University will get free tuition. In a few years, shiny new facilities will welcome cancer patients in Atlanta and brain researchers at Stanford. The announcements about these developments credit generous philanthropists, but fail to mention who else is footing much of the bill: American taxpayers. Like most charitable giving, health care philanthropy is tax-deductible. When wealthy people give away millions of dollars, their tax bills go down. But that leaves the rest of us either to pick up the slack or go without the investments that our government could have made with those funds.