moral hazard

Once you are protected from a bad outcome, you may quietly take more risk or take less care — not out of villainy, but because the sting has been removed. A driver with bumper-to-bumper insurance might park a little more carelessly; a diner whose meal is fully reimbursed might order the lobster. The protection itself changes behaviour. Insurers have a name for this: moral hazard, and it sits at the centre of why insurance is harder than it looks.

Moral hazard is the tendency of people, once insured, to behave in ways that make a loss more likely or more costly, because they no longer bear the full consequences. It comes in shades: some is innocent (you stop locking the bike because it's insured), some is reckless (you skip maintenance), and a sliver is outright fraud (you stage a loss). The crucial point is that it raises the true cost of claims above what the original, uninsured risk would have been — so a premium priced on pre-insurance behaviour will fall short. A small numeric feel: if full coverage nudges average claim cost up from 1,000 to 1,300 dollars, the insurer must either charge for that extra 300 or design the policy to blunt the temptation.

Combating moral hazard shapes nearly every insurance product an actuary helps design. Deductibles, coinsurance, and policy limits deliberately leave you with 'skin in the game'; no-claims discounts reward care; exclusions rule out the worst incentives. The honest caveat: the word 'moral' is misleading — economists use it for any incentive effect, not a judgement of character. Most moral hazard is ordinary human response to a changed price of carelessness, and good design works with that fact rather than moralising about it.