Also, just because I'm sensing where a subsequent question may head, the reason many larger companies cater to their shareholders is in part due to what was stated above. If shareholders are pleased with their returns, the company's financial stability, and bottom line they are more likely to retain and even increase the stock they hold in the company itself. Its why you see so many corporate entities focusing primarily on the financial performance and bottom line when reporting to their board. Many executives at larger corporations also receive bonuses or increases in compensation (liquid or not) when a company is performing well and returns to shareholders are beating projections, etc. etc.
There's also an optics aspect to it for some companies. Since publicly traded companies MUST (legal requirement) generate a public earnings report (covering profitability, financial standing, stability, etc.) most organizations strive to keep their shareholders pleased. All of that is public information and is covered by the media/analysts extensively, so companies want to ensure they are getting favorable press.
In this thread, we oftentimes see the end-result problems of what this 'bottom-line driven' management style creates. Namely, a focus on profits over people, margins over ethics, and the sense that the only thing that should matter to executives are the dollar amounts flowing in and out of an organization.