That might be true according to some of the economic measures we’ve used in the past. But why should maximum efficiency and productivity even be the goal if it does damage? How efficient and productive is enough? If things could be efficient enough to support society without corruption, maybe we should prioritize safety over corruption even if it is less efficient?
This idea that a little badness is more efficient than no badness has played out multiple times in the past and one thing we’ve learned repeatedly is that humans are pretty bad at understanding and accounting for the full and true economic costs of a little badness, especially the humans that are making money. More often than not the damage done by badness is externalized and the costs ignored by the people who are profiting from the environment that tolerates the badness.
There are plenty of examples of this from the environment to product safety standards to the stock market. It was argued (fiercely) that the costs of seatbelts in cars was too high a price to pay for something that wasn’t helping every driver - most people, after all, don’t crash. This flawed thinking completely failed to capture the economic costs of car accidents, and today very few people even in the auto industry would disagree or even think of arguing against seatbelts.
We still don’t grasp the economic costs of pollution. We’re just starting to see the economic damage that allowing a little badness has had over the last century, and it’s already many orders of magnitude higher than most people thought several decades ago.
Similary, we’ve not really tallied the economic costs of poor people who’ve been pushed into bankruptcy by financial corruption. The growing inequality driven in part by lack of financial regulation is almost certainly fueling our political unrest, which we of course haven’t measured economically, and might not end well.