[hvb2]

> Something fundamental is wrong with the economy.

Economies of scale make it so that your home made furniture will still be more expensive than ikea. Same for the Coca Cola example.

For tractor parts, you would still need to make sure they don't break and work within small tolerances.

[pocksuppet]

That depends, doesn't it? If I make it, it costs time instead of money. (Costs of tools are amortized over all the things I might make.) If I get it from IKEA, it costs money instead of time.