One of ds's friends has a father who is extremely well off, but has been terrible about paying maintaince. The man has taken no interest in his child, and the mother has found getting maintaince out of her ex is like getting blood out of a stone. The little girl is living in adject poverty because her father owes thousands. The man is able to afford a whole host of foreign holidays and can easily afford to support his daughter.
I feel that men who hide their income for maintaince purposes should be jailed. Even if they have second families.