| The tiers are not essential vs non-essential. The tiers are relative to the labor component. Goods & services that have gotten more efficient over time as we've introduced technology, automation, (what we do on this site) or been offshored.. have gone up slower than inflation. Everything that has a fixed, domestic labor component has gone up faster than inflation. There's really no other magic trick to it. Food is a great example. Something like 40% of the country lived & worked on farms in 1900. That number is now about 1%. That means 40% of the entire countries labor was required to feed 100%, and now it only requires 1%. So a 2.5:1 to a 100:1 ratio change of food labor consumers to providers. Other areas like education & healthcare, the lack of efficiency is often a selling point. Look at colleges that advertise student:faculty ratios or K-12 districts that talk about classroom sizes. In my experience we've probably actually gotten less efficient as everyones gotten much more precious about the education their kids receive. |