Originally Posted by
moondog
in most cases that I've analyzed the taxes on C tickets are typically in the same ballpark as economy tickets on the same routes.
In short, while the companion certificate might pencil in some cases, you've made several bold assumptions during your pass through the numbers in your OP.
If by "bold assumptions," moondog, you are implying that Ferdinand's assertions are not correct, you might want to check out a few more flights.
The taxes and fees charged by BA for a Club World round-trip seat to Geneva from either Seattle or San Francisco are only $293. Where are you going to get a Y class ticket for that price? Or even twice that amount?
I think you are being a little selective in your data, for whatever reason.