Well some small steps could include - taxes shifting from income to wealth, land and luxury use of resources, lowering barriers to voting for younger people (e.g. the requirement for stable residence disenfranchises people who move about), return to free education, a lower voting age and upper age-limit for politicians… Yet gerontocracy is a problem even in youth-skewed continents like Africa. So to be honest I don't know, maybe some people here on Lemmy have more revolutionary ideas…?