so I imagine there are a lot of conscripts on the frontlines, and that it's mostly young conscripts being subjected to the torture you described.
Yeah, I forgot to mention conscripts. Again, the devil is in the details here.
Modern day Russians have an extreme aversion to using conscripts in conflict zones. This stems from their use by USSR in Afghanistan (1979-1989, 15K-25K dead), and by Russia in the First Chechen War (1994-1996, 5K-15K dead). A few thousand dead 18-year-old boys left a bitter taste in Russians' mouths.
So now there is an
overtly spoken contract between Putin and Russians: conscripts are not going to be used in wars. Only the "professional contracted soldiers" are to be used for actual warfighting. That was the case with Russian invasion of Georgia in 2008, Russia's "covert" invasion of Ukraine in 2014, Russia's intervention in Syria in 2015, Russia's Vagner group mercenary activities in Africa, etc. These conflicts were all fought by "professionals" who signed a voluntary contract to serve and fight. Modern day Russians have zero problems with such an arrangement.
So ever since the start of the 2022 invasion of Ukraine, the Russian government have been walking on eggshells when it comes to conscripts. And it is fair to say that conscripts have never been intentionally deployed to Ukraine throughout this war (with a few exceptions of logistical f-ups that saw a couple of them killed on the territory of Ukraine in the early days of the invasion, and we are literally talking about 2-3 people). Every single case of a conscript getting killed in Ukraine creates a public opinion sh!tstorm that the Russian government has to address and rectify.
That said, it's not like conscripts are not being killed in this war anyway. While they are never deployed to the territory of Ukraine, they are actively used for rear resupply logistics and to "defend Russian borders" while the rest of the contracted army is in Ukraine. This means that:
1. Conscripts are stationed along the northern Russia-Ukraine border on the territory of Russia-proper. They don't assault Ukrainian positions, but they get hit by Ukrainian drone fire nonetheless. Some of them get killed. Their parents get a "sorry for your loss" letter and not a single ruble of a payout. Because technically the conscript was not involved in the actual war, he just died during his regular military training.
2. Conscripts are hazed, harassed, and pressured into signing the contract from the very first day of conscription. Some of them cave in. As soon as they sign the contract, off to the frontlines with them. But by that time, they are technically no longer conscripts, they are volunteer "professional soldiers".
Russia has always had forced conscription though [...] and did have at least a few waves of mobilization during this war,
Don't conflate conscription and mobilization. Since Soviet times Russia has always had conscription waves twice a year. That involves grabbing a bunch of 18-yr-olds and making them serve for a year. Russia has continued with that process throughout the war, but as outlined above, none of these conscripts are being sent to the war directly.
Russia had a single wave of mobilization since the start of the war (September 2022). They raised about 300K men this way from their reserves. Reserves being someone who went through conscription years before. The men they raised through that wave of mobilization were in the 40 to 55 year-old range though. Again, anything to avoid the optics of sending young boys to die.
And after that initial wave of mobilization, they have relied solely on their recruiting campaign to replace losses.