Yes, that's it! Just a mechanism to reimburse the costs. So that when the services we taxpayers provide does get used, it gets paid for. Make it like driving a car, where most states require you to have insurance because of the inherent risks and costs involved.

Is that really asking too much?
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)