Pretty much yes, he's said he trusts Wenger and likes they way he works.
He manages his investment based on the profits returned, he's seen Wenger's record regarding profit so trusts him on that score. If Wenger wanted to spend he could, there would be more pressure on him to get us higher up the table and competing for trophies of course (thus increasing revenue and achieving the right profit level), but Wenger is content making the profits and staying 4th without going for the risky spending tactic.
It would be a risk for Wenger to spend and clearly he's not willing to take that risk, he's risk averse.