Economic rationalism, globalism, etc have always justified that by saying the net productivity in society has increased, so the technician can be taken care of (or at worst, is collateral damage in service of the greater good).
The problem is they don't account for other damage caused by that. People get a sense of purpose from work, many would actually rather work than get a welfare check. Communities are built around industries. Uncertainty and changing circumstances can have big impacts on people, more than can just be measured by subtracting their income from some balance sheet.
Not necessarily - it could be that a lot of effort goes into (for example) how products look, and how polished they are, to increase products' relative positions in their markets, instead of prioritising absolute increases in productivity for mankind.
The problem is they don't account for other damage caused by that. People get a sense of purpose from work, many would actually rather work than get a welfare check. Communities are built around industries. Uncertainty and changing circumstances can have big impacts on people, more than can just be measured by subtracting their income from some balance sheet.