The single quote is understandably a narrow view of the larger article. My view is that the 100% tax on income from the land removes profit motive and price discovery in a way which is similar to outright nationalization. However, I agree with your assessment of the quote as a stand alone item.

https://mises.org/library/single-tax-economic-and-moral-impl...

Actually, no. Land in the PRC is under state ownership, but except for exceptions that would tall under eminent domain here, it is mostly priced by auction, outside of agriculture.

In any case, public land ownership is not in conflict with rent auctions.

In fact it is similar to the error of those who equate slavery and wage slavery. With the latter, you have a choice of employer, even without safety nets.