Take two programmeers, a passionate one and non-passionate about his job and give them the same complex task that can not be solved without invention. I did this experiment a dozen of times over my subordinates and non-passionate ones always fail. 100%. So I do not hire people that just do their job any more.

There's a difference between caring about your job and being passionate. I recommend reading Avdi Grimm's http://www.virtuouscode.com/2014/02/10/the-passion-gospel/, it's really good.

All of them did care about their job equally. To care - is to do your best, to be passionate is to do more than you can.