Suggestion for Team Fortress 2: Domination Tokens

I think it would enhance the game if you could earn "tokens" that allow you to respawn instantly instead of the normal respawn time, which is often 20 seconds. This would be beneficial when you need to get back into the action as soon as possible (for instance, if you're an engineer who knows there's a spy in the base casing his buildings). These tokens would be earned -- I think a good way to do this would be to allow them to be earned via domination: when you dominate an enemy, you earn a token.