He talked about feudal times when landowners had to store their gold. So they had to build these massive castles with walls, hire professional soldiers, train their kids to wield weapons and even give some of their land to particularly good soldiers. That system was really expensive so they needed slaves to keep the whole system going. Since all the other landowners knew that you had all your gold in your castle, when they came upon hard times they would often attack. So, you would give your slaves primitive weapons and have them fight to defend ‘their homes’.

From the serf’s perspective, that system sucked. They worked hard, didn’t get paid and occasionally had to go into battle to protect their landowner. After a few generations, when you say “you know, Grandpa died in a battle. Dad and all my uncles died in battles. Three of my siblings died as infants. And they want me to take a fucking spear and protect that system?

Over the years, the system collapsed because slaves could get a better deal in cities. Landowners couldn’t afford their fortunes and castles fell into disrepair.

Basically, banks seem like a real ripoff until you consider the reality of having to store all your money in an environment where everyone knows whereabouts you have it stored!