A backlog in the courts means that lawyers are more likely to settle cases out of court, which means less jail time, and judges are more likely to send many cases that have been waived to criminal court back to juvenile court.

1. waive 是及物动词，这里waive 没有用错，仍是及物用法。have been waived 是被动式。

2. criminal court：名词词组，“刑事法庭”，不是不定式。

3. juvenile court：名词词组，“少年法庭”，与“刑事法庭” 对等。