Free preschool for needy kids. Kids who are unprepared for kindergarten fall behind their peers in school and later on in life. Let's invest in their futures in school and in life by giving them free preschool. This investment pays for itself.

https://eric.ed.gov/?id=ed366433

Study findings at age 27 as reported in these chapters indicate that the preschool participants have significantly higher earnings, rates of home ownership, and levels of schooling, as well as significantly fewer arrests and social service interventions, than a control group of non-preschool participants. Cost-benefit analysis revealed that, over the lifetimes of the participants, the preschool program returned to the public an estimated $7.16 for every dollar spent.

The later report at age 40 further validates the value of preschool...

https://highscope.org/perrypreschoolstudy

"The study found that adults at age 40 (2005 published 2010) who underwent the preschool program had higher earnings..."