If I might tease something out...
You complain that MON has spent more than most managers. He has managed 2 consecutive 6th place finishes, while those teams who have spent within the same ball park have fallen below.
This pre-season, his net spend has been in the region of £4 million if I'm right, which is nothing. He lost Laursen and Barry, but that was unavoidable, yet aside from Bent, I don't think there was one truly attainable quality player that we have missed out on. So i don't know what else the anti-MON brigade are expecting. Don't say he's tactically inept, because as you yourselves have said, this is a results business and he has gotten results.
After what he spent we finished well up in the league. He hasn't spent this time around because there was really nothing available and he has also lost two vitally important players. If we are lacking in quality (and we are), he is a victim of his situation. He could buy some players to fill up the squad, but with the market inflated as it is, he probably didn't see the point while we have young talented players who would not be completely eclipsed by what we would get if we started bringing in squad fillers. Based on reports we got screwed by Portsmouth into losing Knight and being left without Distin, which could be blamed on MON, if you really want, but is moreso down to the desperation of Pompey.
So the squad is lacking. And it is. But what else could he have done? We shouldn't be losing to teams like Wigan, but the backbone has been ripped out of our side and we are still reeling. I don't think he has, or ever will lose the dressing room, as the team have a great respect for him as a manager. We're trying desperately for Wesley Sneijder who would kick-start our season, but if he doesn't come rolling into Bodymoor Heath in the next 2 weeks, this isn't going to be a hugely successful season, but I really don't think too much of the blame can be laid at Martin's door.