Since I started teaching in the 1970s this was already a problem in Danish schools, as the old-fashioned school desk with a compartment for books had been replaced by tables.
2o years on, schools said books could not be kept in classrooms as there was too great a risk they would be stolen.
And that there was not room for lockers for each child either.
Now, judging from what younger colleagues who still teach tell me, e-books have replaced the old text books, significantly lowering children's loads. So you could look forward to that too, or try to raise the funding for it.
I too have always said and felt that carting heavy books cannot be good for young backs and shoulders, but neither can sitting at desks or tables the wrong height - and these are a world-wide feature of classrooms.
However, the medical profession seems singularly unconcerned with this, so it is hardly surprising that teachers, school bursars and whoever else allocates money to schools aren't bothered.
If anything is to be done to solve the problem, it will have to be tackled both from the angle of health and from the angle of funding for schools, and it is no use waiting for that useful committee member SOMEONE ELSE to do something, as the Reader's Digest publish her obituary years ago!