By keeping their hand secret, the citizen has to error on ovrreporting so as to avoid unreporting penalties. So it makes sense for the gov not to show their han

By keeping their hand secret, the citizen has to error on ovrreporting so as to avoid unreporting penalties. So it makes sense for the gov not to show their hand. The gov is akin to blackjack dealer. However, it's not clear to me how self reporting/filling is not a 5A violation of self incrimination.