Energy Efficient?

While tearing down household goods I always wonder about the energy efficient symbol, especially after tearing out the AL wiring and motor.
Can someone explain how running less draw of current through a less conductive material is efficient? All electric equipment also loses energy in the form of heat, actually a law of physics (formula I^2R I= current R= Resistance). This also tells me AL is a less efficient metal than copper.
beefed up AL wires, around 50% larger than copper on the cut, can handle the amps and current weighing 30% less and costing much less.
what i see is, undersized motors with AL winding's pulling less current, is less efficient than a copper wound motor of equal and slightly greater size, or am i missing something?

basically.... if they want it to be efficient why don't they use copper?
Rassin Frassin AL Motors!!

Energystar.GOV

.GOV Need I say More???

from the site
The ENERGY STAR label was established to:
Reduce greenhouse gas emissions and other pollutants caused by the inefficient use of energy; and
Make it easy for consumers to identify and purchase energy-efficient products that offer savings on energy bills without sacrificing performance, features, and comfort.

you guys ever notice on your own "energy star" appliances... they run twice as long as the old ones? lol