Unless Wenger specifically states it elsewhere, this is what I think Le Grove is talking about (~10:40 mark)

http://www.youtube.com/watch?v=lrNXDAZIYZQ

"I know as well that in the modern world ticket pricing is a problem. We spoke about that alot at the board before that decision has been made, but just to keep the players we have to put our wages up so high that the financial situation becomes more and more difficlut for us"
From that alone it's difficult to ascertain how much involvement he had in the decision, but given his justification of it he is at the very least outwardly complicit.

Why is Wenger involved in deciding ticket pricing? Wenger speaks about the need to keep hold of players in the face of spiralling wage demands. It's self-evident that money affects the ability to build the team. Whether that is justification for involvement, however large or small it may be, I neither know enough to care or care enough to know.

The question in my mind is why?
Why is he talking about the need of extra funds to service player wages when we know that:

a) We have a combined Wage and Transfer budget
b) Funds garnered from players sales are reserved for this budget
c) We started the summer with a £30-£50m 'warchest' (speculatively)
d) We made a transfer profit and we didn't even manage to spend that

With gates stable at around £93m a price rise of 6.5% is little more than £6m. A sum that SwissRamble claims could easily have been offset had one of the minted board members swallowed the £3m in fees associated with Kroenke's buyout.

So why the line about needing a paltry £6m for wages when we did not even spend our transfer surplus let alone the supposed warchest?
And at the AGM why wouldn't they talk about about Tom Fox's bonus or what the criteria for it was?

Tom Fox, if you need reminding is Commercial Director, the guy who on seeing the 40,000 waiting list for season tickets said “As a US sports executive… you think, you’re not charging enough for tickets.”

Both Wenger and Gazidis have spoken about the long discussions over the ticket price hike, presumably to propogate the idea that it was not a decision taken lightly. Then again, maybe they were undecided as to how much they could get away with.