Corporations don't have to worry about a clear conscience. They have to worry about support costs and customer happiness affecting repeat business.
When Apple ships a charger that makes iPhone touchscreens work poorly, customers get irritated and either figure it out and cost Apple money at the Genius Bar or don't figure it out and don't buy iPhones.
The higher price is because people are willing to pay it.
Corporations don't have to worry about a clean conscience, but some of them do.
Certainly, some of their employees care a lot. And in Silicon Valley, the people building this stuff have a lot of options. Apple has managed to attract a bunch of people who like making great stuff. Some of those people would find jobs they liked more if Apple tried to make things that were too junky.
When Apple ships a charger that makes iPhone touchscreens work poorly, customers get irritated and either figure it out and cost Apple money at the Genius Bar or don't figure it out and don't buy iPhones.
The higher price is because people are willing to pay it.