A complaint about greed is good and how it affects our lives

Right now most Americans aren't paid a wage where they can survive off of; they need to take on multiple jobs. Businesses complain when a person goes sleeping on the job, but create the conditions were the employee has to overwork themselves to get by. While Americans may not be opposed to working longer hours, but raising the hours will probably interfere with their other jobs.
The "Greed is good" kind of mentality was rationalized for wall street, but companies have somehow adopted that philosophy into their practices. Food companies pouring so much salt and sugar into their products that it make them addictive and contribute to diseases like diabetes, the GM ignition switch fiasco, the natural gas drilling has ended up triggering earthquakes and poisons the water supplies of towns in those areas are few examples. Leaders of companies need to develop a form of corporate responsibility that overpowers the huge profits they currently make and find a balance between profits, ethics, and the needs of their customers and employees. Politicians should pass a law requiring jail time for anyone in the company who agrees to manufacture or sells a product when they know that product will harm or kill a customer outside what people consider an acceptable risk, like side effects of medicines.
I was told "business ethics is the golden rule applied of how you conduct business". I apologize if that definition is not accurate, but for the business world to operate efficiently they need that mindset. Too many problems have been caused because they didn't, like the 2008 financial collapse.
Right now , the wealthy have more money than the poor than any point in history. I believe we need to take a look at the "greed is good" culture in a historical context, look at how things were before, why there was change, and what exactly changed in peoples' minds.