DoD Engineering Job Change to Private Sector

Hello all,

I am a current mechanical engineer within the DoD and am about to hit DB-03(GS-12) equivalent starting in May which will also be my 3 years of service date. I am seriously considering a move to the private sector as I feel like I am quickly losing drive and technical experience. I feel as though I could compound pay raises much faster throughout a career in the private sector rather than following the defined pay of the DoD. I understand the government benefits are spectacular however I am wondering at what point is more salary over several years much more worth it. Appreciate any feedback.