"putting power solely in the hands of the wealthiest."
Do you think it is? Then let some of the wealthiest try to obtain a permit in downtown SF for a mere block of flats, the likes of which used to be built by the thousands 100 years ago. If it takes less than a decade, I would be surprised.
There is a lot of power outside the private sector. Every environmental or political group that sues any project does, in fact, wield a lot of power of the "veto" variety, which used to be prerogative of kings.