In the quarter century of Putinism to date, ministerial officials have usually been honourably discharged and only ended up in prison in exceptional cases, as happened with Alexey Ulyukaev and Mikhail Abyzov.
Until recently, the Putin system functioned according to the “We don’t abandon our own” principle, by which he didn’t mean soldiers in the trenches in the war in Ukraine, or Russian-speakers in neighbouring countries, but rather high-ranking members of his own team. A certain level of access to the Kremlin combined with loyalty meant you were untouchable, and could protect your family and capital.