
Simple. You pay for it up front.
You can for example buy life insurance where you pay a [link|http://ww2.northwesternmutual.com/tn/insprods--singlepremlife_pg|single premium]. It's just a current one time expense. The pension deal could be a variation on that idea.
Alex
Men never do evil so completely and cheerfully as when they do it from religious conviction. -- Blaise Pascal (1623-1662)