Debate

I'm one of the Chinese Language Society (clsc) MMU.

Today, I attend a small group of clsc that is Debate.
Our coach give some simple brief to us about debate.
He give us an incident example to let us more understanding about debate.
That is:

A country King tell his citizens to be thrifty, so that can save lots of natural resources.
One day, the King attend an interview.
He comes with a huge army and a Mercedes Benz.
One of the reported ask the King, you told your citizens to be thirty, why you come with Mercedes Benz and spend lots?

With this short story, the King is telling his citizens to be thrifty,
well he is the one who do not thrifty.
So, the reported is using the Tu Quoque fallacy to attack the King.
If the King also not a thrifty person, how can he tell his citizens to be thrifty....