Tough interview questions?

Run into quite an interesting conversation from a website I often browse ... That is a website serving specific topics, but this conversation is quite interesting in general ...


-----------
How about this?

Interviewer: If our firm didn't exist , which firm would be at the top of your lift and WHY?

Interviewee: blah blah blah....

Interviewer: But since we do exist, why did you choose us?

...............Tricky little one huh?

-----------
There is an efficient markets hypothesis answer to that.
SuckBank exists because the market supports a bank like Suckbank.
Therefore a firm like Suckbank would arise, so I'd work for them.

Does anyone ever answer this sort of question honestly ?
The facts are that unless you've been invited to join a ream by people you know, you don't actually know very much of any value about any given firm. Sure JP Morgan are big. But actually you're not working for JPM, you're working for some bloke. DrKW is good at some things, and bad at others, but you don't know how good they are in the future, you only know a bit about the past, but as a new joiner you only care about the future. Some senior people are made quite awful to work for by success, others use the power and money you get to build a happy team, others actually believe than unhappy people work better.

The "choice" question is like the "imagine you were a carrot" question that HRs in other domains like.
It's not a question about them, its a test of your "creative" abilities, or more accurately can you say harmless bullshit with a straight face to an important client ?
I have long thought one of the most valuable things I ever did at school was drama lessons....