A common question asked is, how can I increase the number of employees I have? I build all these shops, and I can't employ people!
As far as I know, you can only increase the number of employees in 2 ways:
1) Reaching certain levels.
2) Buying a Headquarters, found under the Corporate Facilities tab when building Landmarks
For number 1, I think you get a cap of 330 Jobs at level 20, 460 Jobs at level 22, and 700 Jobs at level 24.
Will update this as I find out more.