QE is over (though, I wouldn't be shocked to see more).
>0% interest rate for several years is not healthy.
Why not?
>100+ % debt:GDP ration is not healthy.
Why not?
I mean, I wouldn't call the US economy "flourishing" or anything. But it's not sick, and relative to the rest of the world it's looking pretty good (as the strong dollar and low rates imply).