This is the point that a lot of you seem to be overlooking. It's one of the biggest factors in the public reaction to the Marshes (and why they are lumped together), because it's clear favouritism.
"He's not that bad, do we really have better players available, etc."
The fact is that over the last 2 years Shaun has been "that bad", particularly away from home, and there are plenty of other players who are given next to no opportunity who definitely could, potentially, be better performed, especially overseas. Ferguson gets one Test on a green top, gets run out, and is gone forever? Maxwell makes runs overseas in Asia and doesn't even get 1 home test while Smarsh gets picked over and over?
You can twist it in your minds however you want, but both Marshes have clearly been given a ridiculous number of opportunities for Australia relative to other prospective players.