An exchange of goods is not a forced redistribution.
A forced redistribution is when a third person, who has neither a pig, nor any beans, demands a pork dinner with beans on the side from the first two, with no quid pro quo, ie the third person is "owed" something by the first two, just because... well, just because he's special.
Good grief. This is too easy, Wotan. You really need to read a book.