Right, you can go on and off as much as you want (as long as you are an EU citizen) and it's not hard to do this. People who work sporadically or can control when they "facturar" do it this way a lot and may only be dado de alta a few months out of the year.
Excellent, thanks guys, this is what i will do then!!
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Expecting the world to treat you fairly because you are good is like expecting the bull not to charge because you are a vegetarian.