Odd... I've never even worked at any one company for 2 years, so... making work plans based on what someone decides will probably happen in 4 years is simply incomprehensible to me.
The few companies I've worked at have taught me that for the most part, companies can't do much real planning beyond 6 mos to a year at most - the stuff we considered important in 2006 was often irrelevant by 2007 because of changes in the market conditions, competition, etc. Planning out moves that far ahead is probably necessary in some situations, but I've seen enough of those 'long term plans' have to change anyway that I don't actually believe many of them.
The few companies I've worked at have taught me that for the most part, companies can't do much real planning beyond 6 mos to a year at most - the stuff we considered important in 2006 was often irrelevant by 2007 because of changes in the market conditions, competition, etc. Planning out moves that far ahead is probably necessary in some situations, but I've seen enough of those 'long term plans' have to change anyway that I don't actually believe many of them.