I think the discussion here has completely missed one point which is far bigger than the alignment of the chain and sprockets.
What you are really doing when you position the rear wheel after adjusting the chain is aligning the wheels.
If the wheels are out of alignment then the bike will handle like a bag of shite, and you won't need to worry about sprocket wear because you won't want to ride it far enough to wear the sprockets out.
If you get the rear wheel aligned then the sprockets will automatically be in aligment, because the bike was built that way, so you don't then need to worry about sprocket alignment.
If you are really referring to sprocket offset, ie the distance between each sprocket and the centreline of the bike, then yes that is very important and if it is unequal then you will wear out a chain in no time flat, but how on earth can that ever be wrong, given that it was correct when the bike was built adn you have no adjustment for it?
Basically if the bike is well maintained and the sprockets line up as they did when the bike left the factory, then adding some float will only let the sprockets move out of alignment, so whether they float towards the optimum position or away from it is pretty irrelevant.
Mark.