After reading Larry Summers, who supported tax-cuts with almost the gusto of a Republican in the last round of stimulus, a pundit could be convinced more than ever that going with someone who has markets experience is a better vote.
Rubin, if he's willing to do it, may be a better choice, for a crisis. Sadly, the bench is not full (that I know - and I don't know much).
If we are headed toward 10% or greater unemployment, then a labor economist would be a better choice, as well.
[Nothing personal - there is a big set of qualified people, including those above, obviously.]