Why do we need to save?
Why do we need to be content?
Why do we need to work?
Why a man needs to lead the family?
As per the order provided of God, it is clear that a man is the head of family. And if we follow God's order, we can never go wrong.
Why a man needs to provide for the family?
The man is the head of the family as per God's order. And being head, meaning we lead and provide.