Got arrested at the Seattle airport for refusing to say how much money I make. (The uniformed ones say I was not “arrested”, but they definitely handcuffed me.) Their videos and audios should show that I was polite, but simply refused questions that had nothing to do with national security. Port authority police eventually came — they were professionals — and rescued me from the border bullies.
When they handcuffed me, I said that no country has ever treated me so badly. Not China. Not Vietnam. Not Afghanistan. Definitely not Singapore or India or Nepal or Germany, not Brunei, not Indonesia, or Malaysia, or Kuwait or Qatar or United Arab Emirates. No county has treated me with the disrespect can that can be expected from our border bullies.
I know when you are reentering the country, customs and border protection makes you account for money and goods you are bringing back into the country, but why on earth would Yon be detained for refusing to report his annual income? How does this kind of info relate to national security in any way?