If, according to the Keynesians and Säocialists, lowering interest rates leads to economic growth, why doesn't the central planner in charge, the central bank, set the interest rate permanently negative, at -35% for example?

That should then generate a boom, jobs (this always comes up in infantile politicians' speeches, as they pretend being responsible for every employment contract) and paradisiacal prosperity.

No, it's just that socialist politics, or the actively pursued transfer of power from the productive sector of society to parasitic rent-seekers (who might that be?) has merged with the fiat money printer and in this way all the darkroom ideology of resurrected socialists, this time weird woke and in green grubby garb, is printing the necessary cash. Naturally, as the state economists will always deny, knowing better, because they are paid to look the other way, this destroys our purchasing power and pumps the pockets of those close to the money printer.

Doesn't it seem suspicious and strange to you that no important politician ever debates the central bank? That monetary policy is never critically scrutinized by the mass media?

Central banking is a redistribution mechanism and a vehicle to centralize economic and political power. That works so well for so long until we start pulling back the curtain to reveal the scary theater!

By the way: You should read Griffin's 'The Creature From Jekyll Island'. That helps opening Your eyes.