I'm in a similar situation (German citizen living in Germany, working as a freelancer for a company in Asia). As far as I can tell from some research, the only "risk" is that I might have to do some back-payments into the Rentenversicherung.
But if I were to be employed regularly to a company (in the EU?) the same would apply.
In either case, I have to pay for the health insurance, so there's no real "avoiding the cost of social security".
But if I were to be employed regularly to a company (in the EU?) the same would apply.
In either case, I have to pay for the health insurance, so there's no real "avoiding the cost of social security".