Absolutely not, they will generally not depart of their own free will. But that is why we refer to them as "parasites".
No parasite ever voluntarily departs the host unless it has accomplished its goal, whatever that might be, laying of eggs, sucking it dry of nourishment, etc. or if its own survival is threatened by staying in place as a parasite.
In the case of the parasites infesting our government, they will not retire until they have enhanced their nest egg of retirement and pension, or until the government becomes bankrupt.
So we will have to treat real parasites both in and out of our government the same way we treat parasites in medicine, both human and veterinary.
We must destroy the parasites, figuratively speaking. If we can target them and make their parasitical environment too dangerous (professionally speaking, or legally speaking depending on what they have been doing since 2008) or uncomfortable (by causing them to actually work) causing them to self-evacuate from their host, that is the way to go.
If not, we take active action to destroy the parasites professionally by removing them from the host (our government, and our taxpayer dollars) against their will.
Some parasites cannot be removed without destroying the host. And like the image shown at the top, the Deep State, Democrats, and RINOs are going to tighten that tail encircling our necks to make us scream out in protest.