Based on the data I’ve seen, the ratio of the actuarially fair cost differential of insuring someone in their 20s and someone in their late 50s or early 60s is roughly 5 to 1. Setting the ratio at 3 to 1 causes distortions that unfavorably impacts young adults and, as a result, degrades the risk pool. Insurance companies are reluctant to put themselves in a position in which they risk losing money with additional customers and will set prices for older adults so that they can recover their costs in that age group. The 3 to 1 ratio limits how much they can reduce premiums for young adults. The resulting premiums represent “unfair” insurance for young adults and discourages them from purchasing insurance. Discouraging young adults from purchasing insurance exacerbates the adverse selection problem in the insurance market and reduces the incentive for insurance companies to compete for older customers.