Instead they grab the neighborhood geek (or should i say nerd, geeks seems to be too cloud oriented these days) and pay with cookies or beer (depending on age of said geek).
What seems to be going on is a mixed message of "hard to admin" and "don't need to admin" (aka "just works" in Mac speak). Meaning that it is rarely if ever about day to day "usage", but rather about being able to admin their own system.
And frankly i think Linux have a leg up there, as things are actually documented and in plain sight (at least until Freedesktop stuff and, their fetish for using dbus for everything, gets their panties in a twist). With Windows and Mac is it all too often some closed up blob going bad, involving magic incantations found in some forum or blob somewhere.