/The suggestion that there is a generation gap should not (imo) surprise you//
No, and why should it? Isn't the "gap" you're describing, Kromo, actually a natural process commonly called "growing up"? Or, more grandly, "rites of passage"?
An electorate restricted to eighteen year old VE's (I wouldn't wish this on the British people, by the way; it might count as cruel and unusual punishment) would produce governance likely to be extremely uncongenial everybody else, including VE clones who were four years older.
Cultural and educational factors apart, today's youth will be as bright and decent and independently minded as their parents.