@Arild ********
then the work visa is not the right choice for you. It has no foreign income tax and a flat 17% tax on Thai sourced income.
For me it would mean my Australian Super payments would be tax free in both countries. I don’t need to divert money from a tax free environment to Australia to get tax credits. I would need to add another 5 or 6 million baht into Thailand if I were to use the 40k usd option for income and I haven’t looked into income splitting with my Thai spouse under that visa.
Plenty of other LTR visas that don’t have Thai tax benefits of the WP visa.