"Dan Piponi"
The question isn't "Does Haskell need quick&dirty hackers?" It's "would we get better software (using your favourite metric) if we put Haskell into the hands of quick and dirty hackers?". I think the answer might be yes.
This is an interesting trade-off: if we suppose that the most enterprising and creative (i.e. talented) [language] hackers are most susceptible to be lured over to Haskell, this strategy will increase the average quality of software overall, while simultaneously decreasing the average quality of code in both languages!
Note also that there are many classes of people who fit the "quick and dirty" category.
Encourage them to learn Haskell and only be quick. -k -- If I haven't seen further, it is by standing in the footprints of giants