Why does the government get hacked more than mega corporations?

Why is the US government disclosing some sort of breach fairly often when we almost never hear of any from companies like Google, Facebook, and Microsoft (ik MS did just have a breach but fairly small relatively speaking). These companies and the government I'm sure are heavily targeted everyday and all have virtually infinite resources to spend on security so I would think they'd all be locked up as tight as possible.

Is the government just more open about breaches …

breach companies corporations cybersecurity facebook google government hacked mega microsoft sort speaking