Many countries have this 187 days rule: if you’ve lived and worked for more than 187 days in that country you’re automatically a tax resident there. But what if you change countries frequently, let’s say every 2-3 months? Many professions can easily handle that (writers, bloggers, web designers, software developers, etc.) and I know of people who have been living like that for over 5 years.
Just to clarify: I am not talking about the situation when one owns a house in their home country, or they have left their wife with kids there and work abroad. I am talking about people whose all belongings are passport, laptop and two travel bags.
Where are they supposed to pay taxes on their legal income?