Why would anyone have a sight longer than a quarter? I mean how does long term thinking help the execs get their compensation this quarter? Sheesh..worst case scenario is that the work done now will benefit someone else when they've already left.

Also when companies grow big enough "business" becomes the main business of the company. By that I mean everything unrelated to the actual original domain, such as playing in the financial markets, doing stock buybacks, lobbying, cheating etc. When your CEO is an MBA and your real market is Wall Street any actual product RD and support is a real annoying cost that just cuts into the profits and thus into the exec compensation.