That's essentially what France does (and the U.S I think, to some extent with welfare?), you have a right to the "allocation chômage" which is a monthly payment

That's essentially what France does (and the U.S I think, to some extent with welfare?), you have a right to the "allocation chômage" which is a monthly payment from the government and your job is to find a new job. But I don't believe in these perfectly efficient systems, like the one you describe, in which as long as we remove friction everyone can do what they want. Humans are not robots, they need emotional and social stability to thrive. A job comes with a location, social bonds, an expertise, habits ... You can't swap one for another and call it good as long as the paycheck stays the same.