Scaling them does have to do with UBI, because the argument above is that UBI would not work because the price of some goods and services will rise to compensat

Scaling them does have to do with UBI, because the argument above is that UBI would not work because the price of some goods and services will rise to compensate because they don't scale. If supply for these critical goods and services is instead increased alongside a progressive UBI deployment, then this wouldn't happen and we'd presumably in a better position afterwards.