One point that no one seems to consider is that frustrating interview processes are a big contributor to smaller applicant pools; that is, a would-be good employee has applied a couple places, been filtered out by false negatives, and is thus disincentivized from even continuing to look for a better programming job.
Personally, I don't like my current job but am growing frustrated with job hunting. I'm very close to just looking for a bartending job to go along with the part-time valet work that I picked up between jobs, and then maybe doing hobby programming in my spare time for pleasure and profit. I'm serious here: ridiculous interview processes are making the quality of the programmer pool worse by nudging programmers out of it altogether.
Why is it so unreasonable to bring people in on an intern-like trial basis?