[psychoslave]

I would be very curious to be presented with a single case of tax evasion chiefly decided to avoid becoming homeless or hungry.

Also, ethics include one own integrity, it is not about sacrificing everything to others - at least not all ethical inquiries will conclude that.

[Gravityloss]

I would guess a lot of cash paid manual work anywhere in the world is done by poor and vulnerable people, avoiding taxes or any regulations.