No this is stupid.
Many teens need to start their lives early. 14 or so. Apprentice programs but not mandatory school.
Early marriage with no taxes due each year a child is born. Only for the races with low birthrate. Parity you know.
Perhaps rebates of FICA tax paid for as many whole months the father and mother have been married prior to birth, but for no more than 60 months and reduced by 10% for each year of age of the parent above 25.
Another possibility is to include childcare costs for 401-K payout eligibility. Employers would chip in. Young people would make big contributions early in life. My, you’re a wonderful young man. By the way, how much do you have in your 401-K?