Except for the part where I've twice asked you what part of music you're talking about.
Apologies; simply making music of any kind is beneficial, of particular benefit are
singing, rhythm making and instrumental experimentation
Doing those things inspires and engenders a number of important qualities.
That doesn't seem to be a particularly well thought out "minimum standard of education". That seems to be simply letting people play instruments and then learning other things independently.
Yes, just about completely. I'm only advocating music as a
part of a free curriculum, not as a whole solution. Preparation for independent learning is key. I'm aware that you didn't ask for comparisons of the current UK system but I feel that a comparison is important; currently we don't teach young people to learn and consequently they have little overall interest in learning. We teach them to regurgitate facts.We measure the quantity and subjective quality of the regurgitation with little consideration for how each person is able to use those facts or how they might be able to improve upon their understanding of them.
Naturally some students will work hard at elective disciplines but, as we often see now, those disciplines hold little merit for employers in the real job market.
While "many" may learn to play something by ear, some won't.
If the ears work then they will learn to play by ear. Small children are far better at playing by ear than older children - it's my opinion based on many observations that this is not a biological deficit in older children. I'll stress again though; a musical curriculum doesn't form the breadth of my proposition.
I'm also not wholly sure what number will do their own independent learning and in what topics.
I think a much larger number than you expect will learn without even necessarily realising that's what they're doing - the formalities of WALT and WILF would have no place in their consciousnesses. The topics? In the whole curriculum, whatever they like, I can think of no topics where full exploration doesn't include a better-than-minimum level of core numeracy, literacy or criticism.
That's not a minimum standard for everyone, it's a hopefully beneficial for some.
There are many "alternative" systems that do very well, very often they do better than conventional state systems. Montessori (admittedly a mix of free learning and routine curricula) does
very well indeed. Against the current systems I believe that a version of what I propose would be beneficial for many more, I also believe that it would genuinely provide every single person with the potential to reach a minimum standard and to far exceed it.
It's a nice opportunity to have, but it's not something that will be of benefit everyone in order to qualify it as something that must be taught.
I'd reverse the last sentence and say that the minimum skills are something that must be learnt. I feel that you allude to the conventional UK system when you say "must be taught". Must be learnt, not always the same thing. Sure, that zone of proximal development is enhanced by enhancing educators but that doesn't mean we need a list of must-be-taughts.