Modeling a future without Social Security

When we create retirement income models, often the response when mentioning Social Security is something like "if it still exists." While we don't believe those in or close to retirement will see any reduction, there have been suggestions to means test the benefits thereby reducing payouts for those with higher incomes. Another option is to illustrate without the current cost of living adjustment. I would expect and believe it is prudent that we continue to stress test retirement income plans for our younger clients with reduced or no benefits.