Don't forget that it is part of the fine art of company management to decide where the shareholders best interests are.
If the majority of the shareholders are in that particular stock for short term gains, then it is part of the managements responsibility to place those shareholders priorities above the rest, by going for short term gains, possibly by cutting costs and quality.
Whereas, if the majority of shareholders are seen by the management to be in the stock for the longer term, then it is the managements legal responsibility to prioritise those shareholders interests by pursuing longer term objectives, like building a reputation for quality and value for money.