The issue i see with the proposed plan would be logistics. When do people take this test? Do they all take it near tax time? Do we have enough registered doctors for this purpose? What benchmarks are being used as "healthy"? Weight, BMI, cholesterol levels, blood sugar, how fast/long you can run?
Frankly, the tax seems more reasonable, in my opinion. Plus, it is more budget friendly, can be used to help pay for health care 'reform'(whatever that ends up being), and should theoretically bend demand for unhealthy foods down. And for all the complaints I hear about how expensive healthy food is, when I go to the grocery store, I frankly fail to see how exactly it is unreasonably expensive. Keeping in mind, how much you eat is just as, if not more, important than what you eat.
Bookmarks