>1. Get youth more productive

Youth is always more productive because they use tools and strategies worked out by the older.

>2. Make more youth

In some wealthier, western countries many people in their 20s and 30s can't afford to have a dog.

>3. Take a greater percent of youth's income

That's how you divide a nation, young will hate the old, riots will start. Check out "2030: The Real Story of What Happens to America"

>4. Have old people live on less or not retire so early

That's how politicians lose support, Brexit happened because more old people voted than young people, now opinions of old people are being listened to, young are ignored, because they have less voting power.