Perm
Cricket Web: All-Time Legend
It's the same principle as what the All Blacks are doing, not sure whether you are familiar with them. They are resting key players and picking younger, more raw players in their spots in order to give them game time and exposure at the highest level. This will help them significantly along the track as they will have a whole group of youngsters who have already partially adapted to test matches and are ready to play.Which is, plain and simply, wrong IMO. Your best XI should be fielded at all times as far as I'm concerned, and when that ceases to happen, you cease to be playing a test match.
It's a different story if a spot opens up and a young, perhaps not as qualified player is selected on a permanent basis, but resting players from test matches and giving players deliberate one-off series against lower sides is not something that should exist in test cricket as far as I'm concerned.
I know that cricket holds status and prestige as far more important ideas than they do in rugby, but the same priniciple applies IMO.