> The government doesn't delete anything. It might be moved or inaccessible to the public but that data is somewhere in perpetuity.

If the government is democratic and values integrity? Sure.

Otherwise I wouldn't bet on it. My own country's history books and my parents' own life stories have already warned me about how fickle democracy is. No democratic country is free from that fact. Some think "checks and balances" ought to be enough to prevent it, but I wouldn't be so sure.