Most of the people in the photos seem be ordinary, working class people. Even buddhist monks, who swore to live in poverty, celibacy and to avoid food that was too flavorful.

It isn't like we don't have records of ordinary people, even the homeless, or criminals. It's more like people like you claim the existence of a whole another kind of "poor people", who were supposedly the absolute majority, who suffered somewhere, completely ignored by everybody, and worked long hours every day on... being poor? It just doesn't seem to add up.