Miami Man Pleads Guilty to $700,000 Online Identity Theft and Social Security Fraud Scheme | Office of the Inspector General, SSA

Miami Man Pleads Guilty to $700,000 Online Identity Theft and Social Security Fraud Scheme | Office of the Inspector General, SSA.

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How does this happen? And why is the sentence so low?
If he had robbed a bank for the amount he would be in jail for 50 years.