In addition to that complete lunacy, we must remember two things about preschool.
1) Preschool is never better than spending those years in the bosom of a healthy, intact family, learning about life while playing at Mommy's side. Preschool is ONLY better than sitting in an overheating car outside Mommy's crackhouse, or other such neglect. There is nothing wrong with preschool and some families love it, but it's not BETTER than being with Mom, Dad, or Grandma all day.
2) Paying for preschool for everyone means that the least responsible parents will be rewarded for such.
This is an awful idea. Welfare by another name.