Paul Krugman would likely suggest that we practice Quantitative Fuck Easing and print more Fucks.

There you go again, giving a fuck when it aint your turn to give a fuck.

-- Bunk, The Wire

Burnout.

Legit answer. Source: personal experience

Not sure why you're being downvoted, I can attest to this. There's only a certain amount of care you can give at a steady state (though, this does _seem_ to be able to increase, like a muscle at least for me personally). That said, if I work it too hard for too long with too much stress I experience burnout. Burnout, as mentioned many many times by people far more eloquent than I, has different levels. Can be mild, can be major malfunction.

Stay frosty, folks. Make your attention count.