Capitalism Is Neo-Feudalism

So you never actually looked up what feudalism actually is?

Compared to economic justice (the single tax), every system is a variation of feudalism since they all involve the many paying the few for access to land. Only the single tax (taxing only land ownership) allows everyone equal access to everyone's daily source of life (land, location).

This is what the "laissez faire" economists were actually recommending to the aristocracy. Nobody in medieval times was advocating deregulation. They were saying to tax only landlords.

Nope. Not even close. For one thing, anything that is based on commercial profit is already a complete departure from feudalism because feudalism was at heart a subsistence economy.

Feudal European nations were imperialists. They traveled the world looking for gold and trade routes. And they used the same tax system capitalists use today - tax every productive activity as much as possible, but keep land hoarding profitable.

No!!! Feudal European nations did NOT travel the world. Mercantilistic European nations did. The idea of a world wide empire based on trading colonies was invented by the Portuguese in the 15th century, after feudal systems had pretty much fallen the way of the dodo.

Stop trying to make definitions fit the answer you are looking for. It doesn't work. You don't know what feudalism is: it is that simple.

I know that any system other than that suggested by classical economic theory, the single tax on land, will involve the masses paying the elite for the right to use land.

Not necessarily. Sometimes the land owns the masses and nobody is paid anything, just to take a counterexample.