Inventing then was (arguably) less costly and technical than it is now, because those were low-hanging fruit. A lot of the low-hanging fruit has probably been discovered by now, though we can't be sure, meaning that future research aims at higher-hanging fruit and so, metaphorically, the would-be inventors need ladders.
These people need help, not profit, because profit isn't what motivates them anyway.
EDIT: Let's not forget public health reform can save more lives than just about anything else (thank you Oliver Wendel Holmes/Ignaz Semmelweis http://www.accessexcellence.org/AE/AEC/CC/hand_background.ph..., Sara Josephine Baker, http://en.wikipedia.org/wiki/Sara_Josephine_Baker and their present day equivalent, Atul Gawande).