the best hope for the question is to be thought-provoking in itself. (Metatone)

...It's not a question that advances our agenda, but it gives us a chance to see what they're thinking about. (Helen)

a) I'm not sure about the "agenda"; I thought there was no clearly framed agenda.

b) "To find out what they're thinking about" is what I also think is more interesting than the good questions aimed at obtaining precise answers, since

the reality is that the respondents in question are rhetorically so highly experienced (not to mention meticulously trained) that they can effortlessly slide right by any one question, however pointed or pertinent. (dvx)

Therefore, I would try to keep the question as vague as possible with the hope of inadvertent revelations, something like,

It has been said that after this crisis/recession/depression, the economy will be no more as it was before.  
With the hope that it will crash no more, what do we have to expect of the "day-after-the-crisis-economy"?*

Maybe also:
"What role are competing political systems going to play therein? "
(Will it be "politics first", or "economy first"?)

* IMO it's better to not use the question to criticise but to demonstrate that they're trusted to find a solution because we want them to share it with us.