Housing, the American vet and there future

Review a housing program that worked and was implemented after World War Two and perhaps WW1. Which allowed the Veterans returning home, who could purchased a home at a thirty year fixed rate to later be able to sell their home with the interest rate they obtained with the original loan. This was also a time when interest rates were low.
The buyer would need to meet the difference between the negotiated amount and the amount that the current owner has paid off. Or take a secondary loan for the difference in the home value.
By implementing this now for our vet's and perhaps people who are disabled we will create some stabilization in three years when the interest rates start to go up.