Pheu Thai Party member and former energy minister Pichai Naripthaphan cried foul on Friday over a police summons requiring him to report to authorities for failing to comply with one of the regime's orders.
Mr Pichai, who was supposed to meet the police on March 15, said he rarely criticised the government and only did so in good faith and when he was concerned about the state of the economy.
The Pheu Thai Party member wondered whether the summons was intended to distract the public and draw attention away from the many problems the government is facing.
Mr Pichai has found himself in trouble with the authorities on a number of occasions. Last August, he posted messages online about a university scholar comparing the Thai economy to the "boiled frog phenomenon".
The outspoken politician, known for his criticism of the military-led government, was accused by Col Burin Thongprapai, an army staff judge advocate, of violating the Computer Crime Act.
He was charged with "entering false information onto a computer system" from July 26-27 when he posted comments on his Facebook page and in some newspapers.
The controversial postings were mainly comments about the economic policies of Prime Minister Prayut Chan-o-cha and his reference to the boiled frog phenomenon mentioned by a Thammasat University scholar.
The boiled frog phenomenon, used in a managerial context by American scholar Noel Tichy, says a frog that is put in hot water will try to escape while another frog that is placed in cold water which is gradually heated up will boil to death without realising it.
The Thai scholar was warning businesses not to be too slow to adjust to change.
Mr Pichai said he has been summoned by the National Council for Peace and Order several times, for no apparent reason.
Yesterday he said the regime's popularity had hit rock bottom.