You need to look at context.Some of those are highly disputable. If you're going to include Clarke, for example, you can include Sean Marsh, ho has had a similar record but for much longer.
When Clarke was selected, Elliot had just scored 1500 shield runs at 80 in the 12 months prior. Hodge had scored 1300 @ 70, Law 1000 @ 65, Love 1000 @ 60. Mike and David Hussey had averaged 60 odd and the list goes on. We were flush with talented and established players with runs on the board and they overlooked them all for Clarke, who had scored less than 1000 first class runs at about 35....
Shaun Marsh on the other hand, can you name the quality players he leap frogged into the test side?
Brett Lee? I give you Peter Siddle and Mitchell Johnson.
Peter Siddle was selected on the back fo excellent 1st class form over 18 matches, Mitch Johnson was selected after an outstanding display in the shield final.
Also note again, the context. When Siddle and Johnson were picked, which established quality fast bowlers did they leap frog?
Lee jumped ahead of Bichel and Kasper (to name just 2) who had close to 800 first class wickets between them, outstanding records at all levels. So what exactly had Lee done at that point to justify his selection apart from wear a blue cap? Sames goes for Cook and Nicholson, who were picked ahead of proven long term performers from other states.
NSW have had their fair share of unjustified selections, but that's just the point. It's their fair share, no more. Unjustified selections come from all states, but people focus on the NSW ones to confirm their preconceived notion of a bias towards NSW.
Again, you need to look at context. How many stories do you know of coming out of NSW like those of Hodge, Law, Siddons, Love, Cox, D.Hussey, Lehmann etc?
None, zilch. There hasn't been any sob stories of woe from some poor NSW player who dominated for a decade only to be given no opportunity at the highest level, or just a fleeting one.
Can you think of one NSW batsman, that scored heavily in shield cricket for an extended period and weas never given a decent opportunity like the ones listed above? Michael Bevan is perhaps the only reasonable example, but you'd be harsh to suggest he didn't get an opportunity, perhaps he wasn't given long enough, but he sure as hell got more of a chance than Hodge, Hussey, Law, Love etc.
In any case, Hauritz can't be put down as an unjustified selection, in the sense that the selectors were scared of playing Krejza and didn't like Casson so Hauritz was literally the only option.
The spin situation is different. If you're a good spinner, you need to move to NSW so you can play at the SCG, so they naturally attract spinners to their setup, who then naturally graduate to the Test XI.