This doesn't stop the biggest threat against a government-sponsored entity: if they really want to break into your data, they'll just install a key logger into

This doesn't stop the biggest threat against a government-sponsored entity: if they really want to break into your data, they'll just install a key logger into your bios or some other crazy shit like that. All these nice pass-phrases do is protect you against people that get big user dumps of hashes like we saw with the recent Slack security breach. The NSA doesn't need to guess your passphrase. The Chinese equivalent doesn't need to either. They'll just literally watch you type it in. Or use existing vulnerabilities to capture the traffic at your border router. And if you're REALLY a person of interest, they'll just use their CIA equivalent to capture you and torture the information out of you.