Alternate last lines:

He said tighter enforcement of drug laws would gradually encourage smugglers to stop.

He said withholding candy from babies would gradually end their desire for sugary substances.

He said higher taxes would gradually discourage the use of tax shelters.

He said higher inflation would gradually encourage wage-earners to save money.

He said leaving your front door unlocked would gradually discourage burglary.

He said eliminating private property would gradually encourage stewardship of natural resources.
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