Because that is a short-sighted system where society is incentivized to, over time, concentrate all property and power into the hands of fewer and fewer wealthy individuals and corporations, until eventually one day there is no more mom-and-pop. Mom-and-pop is shrinking and will continue to shrink because of "wealth-neutral" policies. Just like what's happened with agriculture. You can't buy a ranch or farm today if you're not a millionaire, and eventually the same will be true of all property that is resource-constrained.