I edited my post as I came to realise just how stupid your post was. Here's version 2:
What a ridiculous post. If anyone was out of it it might be you. You suggest - twice - that the passenger was out of it (based on nothing at all), and even suggest the driver robbed him and should meet with the passenger to sort it out, when anyone with a brain would know that if a passenger was going to the airport he might, might, be leaving the country.
How about the passenger was panicking because he was afraid of missing his flight after being asked to be taken to the wrong airport, and in his rush confused two purple Euro notes with two Thai purple notes. And how about a Thai taxi driver not having a clue about the Thai/Euro exchange rate.