That's not the real threat for confiscation of private land.
This is:
http://www.foxnews.com/politics/2012...th-tax-impact/
Imagine that you own 1,000 farm that you inherited from your daddy.
In order for your son to carry on the family tradition he's going to have to pay 55% of the farm's value to Uncle Sam in death taxes.
He won't have it; so he will lose the farm.
Confiscation of large privately owned farms in the first thing Communists do when they take control of a nation.
It's also why Communists start going hungry soon afterwards.