Since the May 22 2014 military coup in Thailand, there has been no effective and independent scrutiny of defence policy. This is because the 2007 constitution was voided following the coup.
The upper and lower houses of parliament have committees which officially look into the national budget (including theoretically the military's budget). According to the rule of procedure of parliament (2008) number 65 (15): the committees on defence have the authority to investigate any issues that are related to military, national defence, national security and development. But generally, due to the political climate, these committees would not have independently criticised defence budgeting policy or other matters. After all, the committee members are generally composed of retired military officers who retain ties to the armed forces, with other members being civilians with little previous expertise in military affairs who wish not to directly challenge the armed forces.
As of 2014, the National Council for Peace and Order junta allows no legislative scrutiny of defence matters, and there is no elected legislature. In July 2014, the junta did enact a new, temporary constitution, which does not allow the legislature any scrutiny over military policy. In August 2014, the junta appointed a legislative assembly which then appointed the junta leader as Prime Minister, suggesting that the legislative has little independent influence.