Trust
A society can only thrive if its based on trust. Voom! Gone. It's been replaced with:
"It's OK for me to lie because everyone else does it."
No they don't, only those with whom you associate, you weak willed git.
"When I do something illegal or immoral it's OK because I've thought it through and hey, nobody gets hurt."
Yes they do. You do for starters. Slowly but surely you bend your 'rules' that much further, and become the thing you hate most. Untrustworthy. And you blame everyone else/society/stupid laws* but not yourself. You weak willed git.
This applies equally to individuals and corporations.
* Some laws are stupid. To make some laws work we'd need an amendment for each individual that falls under the jurisdiction of that law. So, they have to be aggregated to affect most people in the most appropriate way. The benefits of everyone following them, although not always immediately obvious, are usually there. Speeding for example.