but heart disease is a bigger killer Can't blame Mexico and China for heart disease. So it's of little political value. A government will take on public health

but heart disease is a bigger killer Can't blame Mexico and China for heart disease. So it's of little political value. A government will take on public health challenges whose root causes can be used to confer political value. Other public health challenges may be more serious, but they are worthless to a politician. That's actually why politicians shouldn't be in charge of those sorts of things.