Teeth, language and racial origins

Originally posted by MrGordon: ↑

Where does that come from? You need to show that trade in goods and services using a form of currency cannot take place without an enforcer. Source material, or a formal argument to support your claim, please.
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That there are rip-offs even with enforcers in place is a fact of history both ancient and today. In the time of Jesus’ earthly ministry the annual temple tax was two drachmas (a didrachma). (Matthew 17:24) As Jews from widely scattered lands came to Jerusalem for the celebration of the Passover and paid this tax then, the services of money changers may have been needed to exchange foreign currency for money that would be acceptable for payment of the temple tax, if not also the purchase of sacrificial animals and other items. According to the Mishnah (Shekalim 1:3), on the 15th of Adar, or about a month before Passover, the money changers set up for business in the provinces. But on the 25th of Adar, when Jews and proselytes from many other lands would be arriving at Jerusalem, the money changers established themselves in the temple area.
One of the many duties cared for by nonpriestly members of the tribe of Levi was that of forming what may be likened to a police force. This was under the direction of the captain of the temple. Jewish writer Philo describes the duties of these officers: “Some of these [Levites] are stationed at the doors as gatekeepers at the very entrances, some within [the temple area] in front of the sanctuary to prevent any unlawful person from setting foot thereon, either intentionally or unintentionally. Some patrol around it turn by turn in relays by appointment night and day, keeping watch.”
It was at the temple that Jesus Christ on two occasions overturned the tables of the money changers and condemned them for having made the temple into “a house of merchandise” or “a cave of robbers.”
(John 2:13-16) Now the Passover of the Jews was near, and Jesus went up to Jerusalem.  He found in the temple those selling cattle and sheep and doves, and the money brokers in their seats.  So after making a whip of ropes, he drove all those with the sheep and cattle out of the temple, and he poured out the coins of the money changers and overturned their tables.  And he said to those selling the doves: “Take these things away from here! Stop making the house of my Father a house of commerce!”

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There are ripoffs regardless of the presence or absence of an enforcement agency, the point was that trade is possible without government involvement/enforcement....yet human nature being what it is.....