Well not to get into the legal theories, but in certain cases opening up a corporation is better especially if you do it in non income tax zones, if you live the permanent traveler lifestile. You get to not pay income tax, and if the corporation is setup in low corporate tax country then you save greatly on that. Not to mention you can write off all your costs through the corporation. It takes a good lawyer to set it up, but it's possible. In Sweden it might be very hard if you are resident. It depends on the lifestyle you want to live.