The point, maybe not well made, is that they won't double up to get the missing pieces as long as the team is competitive...like this year's. Also, what was your prediction going into 2013, regardless of how inefficiently the team was put together?
Another point is that by approving the big increase in payroll, they had to know how much more it would take just to retain the same core and to take into account the possibility of needing to make further additions. Now, if AA knew all along that there would be no additional payroll room to add to the team, then it's all on him. However, given how they're operating now, to me, it points to a one-time payroll increase for a couple of years. I also think it was done in large part to avoid going into 2013 expected to lose 90-100 games which would've meant much lower attendance and ratings than they had.
And yes, we've seen this act before, under Ricciardi. They increased payroll for a couple of years only to pull back when he needed to spend more.