[Nova]

"seems to me MSP should require them to take fares and if they don't, they're not welcome back"

They already have a similar policy; from the article:

Airport policy does allow drivers to refuse a fare, only if they return to the beginning of the cab line, which can mean a wait of 3 to 4 hours until their next fare.

If this policy were enforced, the problem would be solved. For whatever reason, this isn't being done.

[paul51]

only if they return to the beginning of the cab line, which can mean a wait of 3 to 4 hours until their next fare.

BS. Guy pulls up with his cab and has to wait 3 to 4 hrs for a fare. I don't buy that.