1 general:: see under CALL THE TUNE.
American Heritage Idioms
2 general:: Phrase(s): pay the piper Fig. to face the results of one’s actions; to receive punishment for something. • You can put off paying your debts only so long. Eventually you’ll have to pay the piper. • You can’t get away with that forever. You’ll have to pay the piper someday.
McGrawhill's American Idioms And Phrasal Verbs