As with many things, there are two ways of looking at this. One is that old people need it the most. Another is that helping younger people is more cost-effecti

As with many things, there are two ways of looking at this. One is that old people need it the most. Another is that helping younger people is more cost-effective because they have more life ahead of them and if you cure them they're unlikely to get another disease soon. The latter is more heartless, but you can't deny there's some merit to it.