What you purpose sounds like unitary theory, which is a scary and absolutely not good practice. Boring career government staff with no personal loyalties are essential in democratic government.
The problem is when the "career government staff" subverts democracy. This should be a problem that all sides of the political spectrum can agree on.
We'll cross that bridge when and if it comes. Until then, let's focus on the individuals actually subverting democracy and not the everyday people trying to uphold it.