Software-center isn't able to deal with root priviledge (which are mandatory to install a software, may I recall…)

[Martin Constantino–Bodin]

I have already reported this, but as it's still not working, I guess no one reads the bugs there… great.
Here is the usual problem: I download a package from the Internet, typically Google-talk's plugin.
It's a package, I double click on it and software-center launches itself. I ask to install/upgrade the software… and I'm facing an *error* saying that I have no priviledge to install this application. This error is a stupid error from dpkg saying “I'm not run as root!”.
Is that so complex to ask for the root password before installing something and running dpkg?!?
Martin, as usual very impressed by how “easy” it is to use Ubuntu rather than any serious Debian system.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: software-center 13.10-0ubuntu4.1
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
Uname: Linux 3.13.0-29-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: XFCE
Date: Sat Jun 14 21:52:41 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2012-01-31 (864 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
PackageArchitecture: all
SourcePackage: software-center
UpgradeStatus: Upgraded to trusty on 2014-05-01 (43 days ago)