Its also important to note that foreigners volunteering for a single event lasting just one day to a few days do not need a work permit. Examples: The Laguna marathon, the Navy League 4th of July Airshow, reef and beach clean-ups, Kings Cup Regatta etc.

I think you are confusing "do not need one" because its tolerated verses "do not need one" legally.

The problem is you can't always get a work permit for living in Thailand while working remotely in another country.

There's no Thai company to stick on the application form.

And you're an EMPLOYEE of the company abroad, which means you can't set up a company to pay yourself through.

Immigration did stop me once on entry and asked how I supported my family because I spent so much time in Thailand, but showing my Hong Kong business card and work permit, along with my marriage visa, sufficed.

But its not uncommon for countries to demand people incorporate..

Simply because you dont wish to meet the costs, does not mean its not possible to.. Its actually fairly easy.