as sibling comment author mentioned, look at dieselgate. it was huge conspiracy against emissikns regulations and they did it relatively well for multiple years. and it’s not like it’s simple hack in software. this solution required manufacturing additional special purpoce devices, adjusting assembly line, engineering and so on. definitely it must have some design stages, testing, actual implementaion done.

main thing here is that in big corps you can divide big (evil) task into smaller steps which could be defined as non-evil in isolation, and nobody in actual implementation people crowd would understand big picture.