These people stole that money. Paying it back is part of their sentence. A sentence for a criminal act. The criminal act of theft, or embezzlement. They are

These people stole that money. Paying it back is part of their sentence. A sentence for a criminal act. The criminal act of theft, or embezzlement. They are, in fact, being "sent there because of their other crimes." If they had taken out loans for that money and failed to pay it back, they would not be in this situation, they'd just have shitty credit ratings.