If used strategically and well-implemented, Lean Six Sigma can be used to help reduce public sector debt given its ability to eliminate waste, improve efficiency and productivity and reduce costs. This could help ensure the sustainability of public sector programs.
According to this survey of Lean Six Sigma experts and practioners, 
“Lean Six Sigma could help reduce the soaring national debt but faces some key challenges in government implementations, according to a new survey by ASQ, the leading global network of quality experts.
Lean Six Sigma has been in the spotlight recently as several U.S. presidential candidates have pledged to use the management tool, if elected. The Obama administration is currently studying how Lean Six Sigma could help eliminate federal government waste.”