This guy and his cronies are all on such a stupid level that it´s unfathomable. Unfortunately, over 50% of Thais will see this as a good thing. In reality it is not a good thing at all.
What he is showing, is total lack of interest for his work and the country´s wellbeing. And now, he tries to refuse payment and payback earlier payment for what he call missed or leave from parliament. He have neglected his duties as an elected MP in the parliament. He has refused to serve the people, and until now, taken payment for it. He have taken a position for a long time, that somebody with interest to do his work could have held and maybe made a difference. (Not likely, but the thought is beautiful).
He should be prosecuted and jailed for his negligence and unlawful holding of position as well as scamming money from the government. This only give a clear signal that all scammers just can regret and pay back and avoid punishment for their actions.