Many government employees would choose less expensive lodging and travel options (rental car class, cheaper airport transportation or parking, fewer checked bags, etc.) if they could share in the savings. As is, there's little incentive to spend less than the maximum allowance. If employees could keep say 25% of the savings, they'd be staying with friends and family more often, camp grounds while doing field work, using compact rental cars, getting rides to the airport instead of parking their own car there, etc.
Idea No. 2496