On the day of the funeral, the Dominican son steps up, places $1000 in the casket, and says, "This seems like a waste of money, since you can't take it with you, Dad. But with the special permission of my superiors, I'm doing as you requested, as a sign of my love."
Next, the Franciscan son approaches the casket and says, "You know I love you, Dad, but the needs of the poor are so great, I just can't let $1000 be buried with you. I hope you understand, now that you are in heaven. Please forgive me."
Finally, the Jesuit son comes forward and says to his brother, "Don't worry, Frank. I'll pay your share." Then he reaches into the casket, takes the cash left by his eldest brother, and puts in a check for $3000.