WHERE DOES THE I.R.S. GET IT'S FUNDS FOR OPERATION?

IF IN FACT THE I.R.S. RECEIVES FUNDS FOR OPERATION FROM TAXES DOESN'T IT SEEM STRANGE THAT THEY SEND HUGE AMOUNTS INVESTIGATING PEOPLE ONLY TO BILL THE PEOPLE THEY ARE EXTORTING TAXES FROM, THIS AGENCY IS A FARCE LIKE THE DEPT. OF DEFENSE.