Ive used rigify once before, to rig a bird. I had some issues which were fixed by scaling the mesh up by a factor of 10. Now I'm rigging a human. I've tried scaling up the mesh, to get a good weight map and solve general rigify issues, but it's not working this time.
Once I bind the mesh, it's very poorly done - raising the arm affects polygons in the legs. Left leg polys also affect the right leg etc.
Can anyone help me get a good weight map without having to do manual weight painting /envelopes?
EDIT UPDATED file here: