How do I deal with a corrupt, selfish team lead without losing my job?

My team representative is a corrupted person. He is helping the TL and the zonal manager along with the deputy manager to cut cost by reducing resources in the team and causing more and more stress on the existing freshers. Since he is manipulating the performance scores chart, he is the only one receiving the incentives. I am not annoyed with him but he doesn’t know that I know it. I feel trapped in his selfishness. I always knew he was a huge trouble but I now believe it. If he ever comes to know that I know it then he will put the whole blame on me. But i don't want to lose the job. What should I do?
How do I deal with a corrupt, selfish team lead without losing my job?
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