[prottog]

> Land being hoarded and/or not being developed to the most of it's potential utility

Land value taxes (in the Georgist/Geoist manner) will ensure that a very valuable parcel of land, such as the one in the middle of San Francisco, will not have a low-value improvement such as a parking lot or a single-story dwelling on top of it.

Too bad that the actual policy we have instead is stuff like Prop 13 and rent control, which all but assures that such higher-value development will not happen.