[wishlist]: matching source code to debug packages for debugger

This has been a long-standing gripe of mine with Ubuntu/Debian packaging. On Fedora, if you install a debug symbols package it also places source code for the package in a location where gdb can find it without needing the use of gdb's "directory" command. Is there a reason why this can't be done on Ubuntu too? If adding the source to the debug package is really a problem (I can't imagine it is a space problem these days) then the debug symbols could at least be made to refer to a sane source location, probably /usr/src/<package> or similar, that one could then apt-get source into.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: debhelper 9.20160115ubuntu3 [modified: usr/bin/dh_gencontrol usr/bin/dh_strip]
ProcVersionSignature: Ubuntu 4.4.0-24.43-generic 4.4.10
Uname: Linux 4.4.0-24-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Jul 6 19:02:26 2016
InstallationDate: Installed on 2016-05-31 (36 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
PackageArchitecture: all
SourcePackage: debhelper
UpgradeStatus: No upgrade log present (probably fresh install)