If you would kindly explain how it is that a currency redeemable in payment for land rentals would cause a bubble in land prices compared to a currency which is not so redeemable, then I'd be interested in your logic.

As for feudalism, where on earth do you get that from? What makes you think that investment in future land rentals would give an investor the rights of a feudal landlord?

Throwaway and ill-thought responses like that do you no favours.

"The future is already here -- it's just not very evenly distributed" William Gibson