It's about time that pure power & faith builds actually needed to put anything in the game. In the post directly after the scavenger golem change, I've mentioned this exact thing - make pure power & faith builds put something in scavenger golems too so they contribute to the economy around their ratings as well since that change would favor attackers more as they can just live off leeching off farming builds (Since pumping power is cheaper than pumping both Fortification + the Scav golem upkeep to even combat it). Unlimited extraction without putting in anything was never a sustainable model and I don't know why it took this long before it was deemed required.

IMHO, the max steal scavenger golem multiplier is still a bit too high (very likely a non-factor still) but it's still a step to the right direction.