What is the proposed idea/solution?
Give the user a way to switch the font used to render numeric data. This would allow me to switch to a font that has fixed width numerics so numbers have identical sizes.
How does is solve the user problems?
In pivot tables, make 100.000 and 111.111 look equally big. Currently the first will look like a huge number. The second will look tiny in comparison.
How was this validated?
Look at any table with numbers. See that 1 is not treated the same as 8 (width-wise)
Who is the target audience?
People who like to have a quick-look at a large quantity of numbers and not have to translate the things they see internally.
ps. there is no label for User Interface.
