"Assuming you are asking earnestly, because of diminishing returns." The economics of this are showing increasing returns to the worldwide medical cartels, so

"Assuming you are asking earnestly, because of diminishing returns." The economics of this are showing increasing returns to the worldwide medical cartels, so this looks like it will continue indefinitely. With broad immunity to product safety laws, why not lay in another billion or two as profit? The C-level company staff will gleefully take home fat bonus checks.