On a daily basis your immigrants and homeless are trained into workers(80%), artists(10%) and scientists(10%) Every homeless/immigrant card gives 0.01% chance for training. Every Job Center card gives a 3% chance for training. 6% with Government Boost. For training to work you need both Immigrants and Homeless. 10 Popularity is required also.
From the Wiki. So, it only affects immigrants and homeless.
Thanks for looking it up. I didn't think the number had a factor but I do have some Job Centers.
!ENGAGE 10
ENGAGE
tokens.