Unfortunately that costs money equipment, fuel, labour
Burning is cheap and easy and works well with out herbicides, costs money equipment, fuel, & labour are what the Thai government needs to spend its money on, not submarines or crazy tax sceems which will actually cost them more than they will make.
And the elephant in the room is population more folk need more cheap food!
Glass half full mentality never won the day. The elephant in the room is costs money equipment, fuel,& labour which the Thai government needs to spend its money on not buying submarines.