Doesn’t have dependencies. (See apt-cache show kde-wallpapers-default.) So dependencies and size is not an issue.
But also has not much files.
apt-file list kde-wallpapers-default
kde-wallpapers-default: /usr/share/doc/kde-wallpapers-default/changelog.Debian.gz
kde-wallpapers-default: /usr/share/doc/kde-wallpapers-default/copyright
kde-wallpapers-default: /usr/share/wallpapers/Elarun/contents/images/2560x1600.png
kde-wallpapers-default: /usr/share/wallpapers/Elarun/contents/screenshot.png
kde-wallpapers-default: /usr/share/wallpapers/Elarun/metadata.desktop
Effectively only /usr/share/wallpapers/Elarun/contents/images/2560x1600.png. Would that help?
My mistake, only sudo apt-get install kde-wallpapers would require 90 MB.