Yes, but come on, you know as well as I do that the car allowance thing is a bit of a red herring. You were a commercial lawyer if I recall correctly, so obviously that was just another inventive way your employer found to throw
even more buckets of money at you and your colleagues

!
Possibly a tax-efficient one for both you and them at the time, and one which likely isn't used any more because that opportunity has been tinkered with since. It wasn't an incentive to do anything in particular, it wasn't linked to anything in particular, it was just
even more money in a ludicrously remunerative niche that only exists within a London bubble almost completely detached from the rest of "normal" society.
It's a sweeping generalisation that those are default benefits in most private sector jobs and it belongs in the same class of sweeping generalisations as the one that says it costs your employer £100kpa+ to pay you £60kpa+ merely to get you to push a few buttons for 35 hours a week.
Pretty much 100% of commercial jobs come with money purchase pensions for a start, often with a "Here's 5%, beyond that you're on your own, now f off" sting in the tail. The comparative costs of any sort of Defined Benefit alternative are enormous, rarely understood and widely ignored. Try building up the £750k+ fund needed to replicate a decent DB equivalent with minimal contributions from your employer for an instructive start.
Anecdote doesn't make data but my experience is of recruiting into a workforce almost entirely made up of PhD level STEM professionals with decades of experience in a cut-throat globally competitive commercial context. Remuneration is a reasonably generous salary, the legally mandated minimum employer's money-purchase pension contribution and
nothing else whatsoever.
Everyone has to maintain their skills - for which read, essentially adapt completely every few years. Anyone trying to rely on their skills and knowledge from 10 years ago now would be as much use as a newborn baby. The principles of physics and mathematics don't change, but the day to day reality of doing the job is unrecognisable. You do this at your own expense and to a significant degree on your own time. If you don't, you'll be history in short order. Replaced by someone brighter, harder working, and these days quite often a (usually frighteningly impressive) product of the Chinese university system.
This might look like veering wildly off topic - but it isn't. Viewed through that lens, expecting to be paid off for just continuing to do your job in a way that's compatible with current practice looks completely surreal.