Can you expound on this? What regulation? What "preconceived notions on what work day, weeks, and lives have to look like"? Unions and higher wages enable people to afford families, and I am an aggressive proponent of a 4 day work week at 100% pay considering productivity gains over the last half century, but I'd be interested in your thoughts.

There are infinite ways to do this and we could riff all day on it. The simplest as I see it would simply be giving individuals with young children the autonomy to dictate their work schedules, allowing them the option to make up the hours later, or even choose not to. In a way this already happens informally in nicer companies.