It seems to me, this week as new second-bag fees come into effect at the major carriers in Canada, that we could all save a lot of money if we just went back to the days when luggage had to be carried, not rolled.
It weighed less because we packed less, and we weighed less because we actually were physically engaged in this and other everday activities (remember when we'd take the stairs instead of waiting for the elevator to go up one floor?).
The airlines would save fuel because there'd be lighter and less luggage, and save fuel because we'd be lighter passengers. We'd save money because we wouldn't want to unnecessarily heft a second bag just so we could have a better selection of evening wear or three swimsuits or whatever, let alone part with cash for the privilege.
And with all the extra exercise, the frequent traveler would look a lot better in (or at least underneath) our rumpled suits.