Assume you want to early retire in CH, but because you are a foreigner the AHV obligation is really a bad deal for you (you can not catchup with payments compared to a Swiss person).
I am aware that there is a Beitragspflicht if you’re not working.
But also, the AHV might not find you and I think you’re only liable for up to 5 years of AHV payments.
Assume you think AHV is a “bad deal” anyways and you try to ignore AHV for 15-20 years – what are the realistic bad consequences? Assuming nobody notices, it might be that you have to pay back the final five years before retirement? Will the AHV one day reach out because they will notice?