Extraneous BLOATWARE

I build machines for government use. Users do NOT need GarageBand, iMovie, Keynote, Pages, and the rest of the programs that have invaded what was a clean OS. I need to remove this bloatware permanently. At one time, it was a fairly simple operation but there seems to be no way to do so now. Now it seems that after every reboot, GarageBand and it's invasive fellow programs are reinstalled. Thanks, Apple. Is there a permanent way to remove these unwanted programs (and that includes Chess and Sari and Maps and Stocks and a boatload more)?