There is a script /usr/lib/pm-utils/power.d/wireless which sets wlan powersavings through iwconfig and iwpriv or quits silently if those commands are not found. Although "core/wireless_tools" is not maintained upstream (and the real solution is to make pm-utils use iw), IMO pm_utils still needs an *optional dependency* on this package, so that the above script is not crippled by construction.

Thanks.