Trends that can't continue, won't.
If something cannot go on for ever, it will stop
For almost 50 years polls have shown that a large majority of the public believe that the budget should be balanced, and for all that time they have elected office seekers who would not balance it. The public cares about deficits, but doesn't care much.
Things that can't go on forever... don't.
If a thing can't go on forever, it will eventually stop.
Consumer: A person who is capable of choosing a president but incapable of choosing a bicycle without help from a government agency.