What does boxing do after Mayweather retires?

[beenKOed]

Outside of America Mayweather is a virtual nobody.

He's a boxer, he's not that big a deal in the US either. It's hard to find anything about boxing in a newspaper these days. It's all about team sports, except during the Olympics.
What would happen if Froch, Groves and Khan all retired? Would boxing in the UK stutter step, stumble and grind to a halt?
They're athletes, they have the potential to make a lot of money and entertain us, but none of them are bigger than boxing. They all can and will be replaced by and by.* Have faith, you will survive!

*Broner is the one exception. How could that piss pot ever be replaced?