There used to be a saying prior to Social Security, the old died in the summer from lack of food and the winter from no heat. We will return to that then, and no I do not think their will be any mad max stuff old and disabled folks rarely have enough energy to cause problems.
The fastest growing age group in America is composed of citizens over age 65. The new political interests of the elderly have been mobilized under the umbrella of "gray power."
Young ppl have nothing but debt and responsibilities. What are 'they' going to do?