"such men as Sir Francis Drake and Sir Walter Raleigh made huge profits from overseas adventures."
Yes, because they were originally nothing short of glorified 'licensed' pirates...
Anyway, let's hope that they remember that the people on the Mayflower and the like, were 'well off' townies, and not country folk who would have been accustomed to 'surviving' in hospitable environments. So could you imagine the average city trader and the like doing a similar type thing today? No wonder they needed the turkeys...