The Wine package is so dated

Wed Apr 27 17:12:10 UTC 2016

I have just reported a bug about the Wine package, and a developer told 
me the package version we are using is very outdated and we shall 
consider upgrading it.

The current version in Ubuntu is 1.6, exactly the same as in 2014-04. 
Where the stable Wine version is 1.8 and the development is 1.9.

Debian unstable is also using 1.8, so it seems Ubuntu is not directly 
syncing the package from Debian.

Any idea why is this?