Taxis.
I can rent a car for $15 per day, lease for like half that, or own an old one for a few dollars a day. Gas is about $3(city)-$10/hr if you're at highway speeds. Insurance is maybe $1-2 a day. However, put all that together and pay some poor immigrant $8/hr to drive, and suddenly it's worth more than a top end surgeon.
The basic idea behind trade/money is it acts as a value store. I drive you home from the bar tonight, you give me an IOU. You drive me home tomorrow, I give you that same IOU back. Right now that exchange is an order of magnitude out of whack.
Naturally they are only so outrageously overpriced because of the monopolistic cartel system you have in the west and artificially inflated tag fees. In Asia I've spent 5 hours in a taxi in stop and go traffic burning not a lot of gas for $25. In the west the cost would have equated to leasing an SUV for a month, and paying the driver his $8 an hour.