Here is another idea that I have not seen canvassed before.
General Prayuth could form his own political party and seek legitimate office through elections. If the current high levels of public approval continue, General Prayuth and his party’s candidates would romp home to form a majority democratically elected government.
The general should personally scrutinise all applications for party membership to weed out the dynasts, the godfather figures and the mafia-like thugs who have managed to infiltrate Thai political parties in the past.
And, of course, following the general’s “happiness” theme, the party would be called the Sabai Sabai Party.