Commercial insurances will also often pay for risk improvement works and assessments for their customers' businesses on the basis that it will reduce the incidences of claims and/or reduce the cost of claims if they do arise.

> At the risk of getting political, (governmental) healthcare is another one, where regular checkups can save you thousands in repair. It might look like a subsidy but in the end it becomes a net-benefit for everyone in the pool.

This is part of the theory behind the Affordable Care Act and its subsidies, in that the more people who have health insurance, the bigger and more diverse the pool, it becomes a win-win-win for insurers (bigger pool = good, more money, more customers, more profit) consumers (health insurance = healthier, better life) and the government and country overall (healthy population = better long term prospects for the country).

Of course, true universal healthcare programmes like the NHS simply abstract that away by removing the profit incentive entirely, cutting the insurers out of the equation and turning it into a more straightforward "the government pays for healthcare because a sick population is just a plain bad thing". It's as such not really a "risk pool" or "insurance" in any real sense, because the amount you pay into the system is completely disconnected from your risk of drawing out of it (and indeed, given the correlation of poor health and low income, likely inversely proportional).