It was obvious at the end of the day which team had higher moral bearings. To risk the entire race to pay a cab fare by begging says it all. I guarantee you, team Romber would have screwed the cabbie and head for the finish line without batting an eye if in the same situation.
Again let's not lionize U&J. I am sure their paying of the cabby was a requirement of the race, not some kind of selfless act. Is everyone here as nice as pie when they play Monopoly? "Oh that's OK, you don't have to pay me rent for the Boardwalk hotel." Do you give your fellow players all the information they want or need when you play poker? I have no problem with how Romber played the game. I actually hated Rob when he was first on Survivor. Eventually I realized "It's a game."
Pure speculation on your part. The reason team Juchenna didn't stiff the cabbie is that they could have been charged with theft of services, and possibly have been in violation of TAR rules.