Ask HN: Would your CEO give 20% time for equity in your side project?

Lots of entrepreneurial potential is wasted because talented 30-somethings have a busy day job and a family, and can't find time for their side project. Would your CEO accept this offer: you get Fridays off to build your side project, and if it gets traction and turns into a real business, your employer gets a cut. Sort of a Y Combinator for mid-career people.