[Social security recipients: must they pay now or not?].
D003363:Cost Control / Q000331:legislation & jurisprudence; D005858:Germany; D006801:Humans; D009313:National Health Programs / Q000191:economics*; D020414:Risk Sharing, Financial / Q000191:economics*; D012943:Social Security / Q000191:economics*; D013660:Taxes / Q000191:economics