I think that a weight at the top of the mast is the obvious solution. When the Tornados went through a spate of new mast designs in the early 80's I ended op with 0.25Kg of lead screwed to the top of my new slim taper Sailspar mast.

If we go down this path then people can build the mast as light as they dare, add the appropriate tip weight for the year or two then reduce it over time. They will always have a mast that is 'down to minimum'.

The reason for suggesting that change like this should be spread over a longish period is so that people have the opportunity to do just what I have outlined above. If a heavier mast remains unbent or unbroken during that period then it is up to the individual to either keep it or replace it with a new lightweight one and use it as a spare.