To realize the importance of the value of cleaning, try going without it for long.  The building will still stand.  The lights will still work.  The windows will let in light.  But, if the cleaning is neglected, things rapidly go downhill for any building.  So many things will continue once the building is built.  The services and maintenance of the building become the MOST IMPORTANT liveability factor for any building.  

LEED is primarily concerned with the building construction.  The Green Clean Institute is more concerned with the cleaning program.  The construction is a huge one-time commitment that addresses energy use, building materials, ventilation, carpet, and furniture.  Once done, a Green building can degrade from this pristine status to a not-so-green eco-system.