Okay, I was in too much of a hurry to down that illicit glass of bubbly before lunch; now, with clear head and full belly I see that I should have been more precise!
The point I as trying to make is that machines are not people. It is only the human part of the equation that has the sentient need for life and the requirement to work and earn in order to sustain it (I appreciate there is also a sub-class of human that thinks differently, but that only survives as long as do the earners. This is also balanced, to an extent, by the other, super-affluent part of society that has need for neither work nor charity). Machines, left to themselves, have no need for anything at all; as they do not feel anything and do not have a sense of self, they have no wish for a salary. As they have no such wish and as they do not drop round to the local shops to buy anything, they do not further the supply of circulating money or credits, if you wish to quibble the semantics of cash v. card.
Ultimately, with no wealth being created, there is no money supply and thus no commerce, meaning no production of life-sustaining goods.
For many (meaning for me) the more automation in the factory or anywhere else, the less need for man to fulfil the rôle, and so on to subsequent unemployment which, taken to the finite, means total, world-wide idleness. And chaos.
How did we get onto this kick, anyway?
Rob C