[danmaz74]

Saving a few pennies per unit, times millions of units, makes a very big impact - and is integral to how industrialised civilisations became so rich compared to previous ones. Ignoring this kind of math isn't going to help teachers or carers for the elderly.

[blfr]

Yes but saving a few pennies is not how industrial civilization got rich. Mass manufactured goods are orders of magnitude cheaper than their hand-crafted equivalents.

[danmaz74]

My point is that, of those orders of magnitude, some came out of innumerable penny savings accumulated over 200 years.