Hi threesixty
I asked your question to another JAG refugee, and he told me that the burden is on the company to pay the social security.
The questions are probably something to do with their avoidance of this by employing people through a Malta subsidiary for 10 years, until the Austrians put a stop to it and demanded 10 years of back-taxes / SVA. But you probably knew that story already...
I guess they're chasing the company and not you. Good luck