I have pulled in large grants (comparatively speaking for a humanities discipline). I read the Concordat carefully, and have always given my post-docs ample time to do their own publications - more than I get, actually!
So it is possible to be a research high-ranker and try to facilitate ECR careers. And by pulling in grant money, when my younger colleagues are not in a position to do so, I'm protecting their rights to sabbaticals etc - at my university (Russell Group blah blah blah) these things all count for the team, as much as the individual.
My current post-doc would be working in a non-academic job if they weren't on a 3 year postdoc with my project, and they are given time for getting their first book out, as well as carefully chosen teaching to plug perceived 'gaps' in their CV. My aim is that they resign halfway through the project because they've got a "proper" job.
My buy out (such as it is) gets rolled into departmental funding of 2 0.5 Teaching Fellows, again giving recent postdocs experience and some money for 12 months.
In the current climate, we do what we can ... It's not good or enough, but it's better than nothing - without my grant, 3 people would not have academic employment. I still teach - indeed, I'm the senior professor but teach 1st year small group work ... I don't think the kids realise that this is actually quite unusual.
Part of the problem is that we train PhD students in all sorts of professional stuff based on the assumption that they're going into lectureships as "in the old days" (a phrase I've heard thrown about by the radical kindness lot).
There never was a "Golden Age' - I got my first job in the late 80s (a 5 year Teaching Fellow 0.5fte contract while I did my PhD) and there was precarity then. I was bloody lucky to get my first permanent job - it was because of a unique combination of my research interests & extra-curricular activities. Of the group of about 10 I did my doctorate with (largest most prestigious department for my discipline in the country) only about 3 of us remained working in academia.
The good old days of university expansions in the late 60s & 70s employed pretty much exclusively men, and only 15% of people went to university in the first place. So - do we want to go back to that?
The issue is larger than individual senior academics can solve, and frankly, going on strike about precarity is a pretty useless and uncreative way to try to force change.
I've been pretty disgusted by the pile on to Mary Beard, as well. If I didn't think I'd add to her workload, I"d email to send her good wishes.