Possible Clues:

• Inflatable rubber bags
• Inflates benefits to include everybody
• The flighty types that get blown up out of all proportion by The Party regulars that are full of air
• Lighter-than-air aircraft run by hot air
• Quickly gets higher bonuses, impressing everyone
• Once party is over, they may have a deflated look?
• Everybody's into bonuses - they give people a lift