Art. 59 BV; conversion of an unpaid money fine into imprisonment; distinction between debt enforcement by detention and penal conversion. The constitutional abolition of imprisonment applies only where detention serves to compel payment of a debt. It does not affect the conversion of an unenforceable monetary penalty into imprisonment as a different sanction. A complaint alleging breach of cantonal constitutional liberty by such conversion must, in the first instance, be brought before the competent cantonal supervisory authorities (consid. 1-2).