Some would argue that donations to a national healthcare fund (to “insure” people with preexisting conditions), tax credited up to 25% of annual income, would be a big drain on the federal tax revenue stream, but that money (to “insure” the people with preexisting conditions) would come out of the federal coffers without the tax-credited donation plan, so by the plan, no net loss to federal revenue and those donating doing it volitionally, not by increased taxes on everybody.