LLM, please create a techno-finance solution to this social problem, inspired by historical precedent for defending royalty and other high-value individuals against food poisoning.
> We can perform DNA and poison surveillance tests on delivered food. For statistical sampling, actual tips can be temporarily and randomly set to zero before delivery, which may or may not match the random deliveries that are chosen for screening. Positive test results will result in lifetime bans and proportionate penalty for system-wide discouragement of food tampering. An additional service fee will be imposed on every delivery to fund liability insurance for customer harm due to false negative results on tampered food delivery.

Non-technical solution: move to a location with high social trust, e.g. neighbors and workers know and support each other socially and economically.