Given how easy it is to disable satellites, does the US military not have contingencies? In the case of all out war between super-powers, it seems to me that all satellites would immediately be taken out. Not planning for that is simply stupid.
The military isn't so stupid as to ignore Kessler syndrome.
http://static.googleusercontent.com/media/research.google.co...
Also launching an anti-sat missile is a comparable problem to launching a satellite into the target orbit. A bit cheaper, but within an order of magnitude. That makes high orbit satellites, particularly in GEO very expensive and time consuming to target.
Put it this way, the US and Russia have had decades to put up all their satellites. You're not going to do enough launches to take all of that out in a few weeks, or even months.
Non superpowers don't worry about how their actions will affect they future abilities, but superpowers do.