To be fair, we don't know what going on in that bundle of several billion interconnect neurons between everyone's ears; what the OP refers to as "accountability

To be fair, we don't know what going on in that bundle of several billion interconnect neurons between everyone's ears; what the OP refers to as "accountability" is actually process transparency, and we certainly don't have process transparency for individual humans the way we do for human institutions. We do have accountability though--the ability to recognize mistakes and learn from them (with incentives, i.e. rewards and punishments). Machine learning can also have this sort of accountability--if you fuck up, the fuckup is another data point to train on, perhaps weighted for the seriousness of the fuckup.