If we step out of a supermarket with biscuits and there are hungry faces on the street, we are implicated. When we live in houses built by labour which is to live in huts forever, we are implicated.
It is black-and-white. 'There is enough for everyone's need but not enough for everyone's greed'. We are the cause of another man's hunger - by claiming a portion beyond that which addresses hunger adequately.
In an ethical community, one person would not be allowed to possess more than twice or four times as another ... 'there is anough for everyone's need, but not enough for anyone's greed'. In our 'future security (insecurity)', is hidden another's man's starvation.