After 30 years even if it changes, let's say during the Clinton era much changed. It lasts a decade and then the course corrects to the trajectory it was on bef

After 30 years even if it changes, let's say during the Clinton era much changed. It lasts a decade and then the course corrects to the trajectory it was on before. The people that affected the system are now irrelevant or soon dead. The new generation has forgotten the past.