Well he is actually right, almost none of the foreign business owners, for example restaurants bars and so on, never paid a dime of tax or minimal fake taxes. Same for all profits on property rentals etc etc etc.
Thailand has basically made zero effort so far, to even enforce things for what was always applicable already. Let alone the new change to transfers to Thailand while being classed a tax resident, or let alone the fantasy pipe dream of overseas income.
The country would be half empty in no time, the south would suddenly have property available and hurt property developers. All this while they are under high pressure already in general.
Do you really think it is a magic trick or accident that the news went silence for so long already? Most of the entire news was all and only due to the new appointed woman boss of the TRD. Now she is in place, she will shut up. This happens all the time with police stations and immigration bureaus as well. Until the dust settles.
They might have a tiny chance of success if they allow us to first deduct the private education 100% before having to pay any taxes, if any taxes left. I'd accept a flat 10% not a .25% more + with a 3-5 yearly visa.