Except there are parents out there who would view as it an opportunity to "get ahead" by holding their child back - regardless of their readiness and maturity. Much as French immersion programs are being overwhelmed as more middle-class parents see it as educational advantage (rather than language opportunity), so too might the growing hyper-competitiveness of parents lead to increasing numbers holding children back.

Such is the nature of our increasingly competitive, winner-take-all world - the collective action problems spread and deepen.