A government data breach can cost tens of thousands if you opt to pay a ransom. (It is recommended governments NOT pay) Recent hackers that stole government data from Atlanta and Newark demanded between $30,000 and $51,000 in Bitcoin for the safe return of government data.
If data is lost for good, it can cost millions to recuperate your losses. After Atlanta decided not to pay their ransom, the speculated cost for the city government was upwards of $17,000,000 in taxpayer dollars to repair and secure systems.