In Inkscape, resize both the document and its content at the same time

I've been struggling to do something that would seem pretty basic:

In Inkscape, how can I resize the document and its content (i.e. drawings) at the same time?

A little bit of context: I want to resize a fairly large number of SVG documents from The Noun Project (they are typically 100x100px docs) without having to explicitly resize the actual drawings.

N.B: If there's a command line solution, I can work with that too!

Answer

There is currently no native way to do that in Inkscape. The only way is to resize content and document separately.