This idea can be expressed also by looking at Gold vs Oil (two widely traded assets).

1968 - Gold was $35/oz, Oil was $3.18/barrel. Therefore 1oz of gold would buy you 11 barrels of oil

2024 - Gold is $2400/oz, Oil is $80/barrel. Therefore 1oz of gold would buy you 30 barrels of oil

That "gain" of 20 barrels in purchasing power largely came from computers/ new tech / etc. That is to say, in a rational (non-inflationary) world, its enough to just save.

(I know that Gold is very imperfect as a measure of inflation, and the above calcs are not purely accurate, however they are correct enough as an example)