Trading pokemon cards shouldn't constitute a contribution to "society".
Two people exchanging Pokeman cards are maximizing their utility, benefiting from the exchange. This results in a betterment for society as 2 people gained something at the expense of nobody else.
Everybody is not entitled to benefits from a transaction.
How you figure? Can you give me an example of two people involved in a 'transaction' in which one (or more) parties do not benefit? I think theft would be a good example, but can you think of anything else?