No-one ever said that left wing politicians are perfect. They are far from it.
The issue is 2-fold. You’ve not shown an example of what was originally discussed (blatant breaking of tradition , with no justification other than “because we can”). It is more normal corruption that creeps into all political systems.
The second is the scale. It’s akin to comparing a school shooting, with dozens of fatalities, to a playground fistfight. Both are bad, but the scale is vastly different. Saying they should both be punished equally would be blatantly absurd.