Certainly at ANU, students would much rather join their law degree with an arts degree than a commerce degree because by the main firms in Canberra that employ law graduates, an arts degree is seen as more desirable.
But i never said that in some instances arts/law wasn't better. Clearly for some situations they are. But in aggregate, Com/law is better in terms of career opportunities.
a job at DFAT
But what sort of job? Toilet cleaner? It seems awkward that you suggest arts/law is better than com/law for "a job" (whatever that is supposed to be) at DFAT, as it is after all, the Department of Foreign Affairs and Trade
Indeed if you look at the DFAT graduate careers page:
http://www.dfat.gov.au/recruit/graduates/index.html
You will see that there are two graduate programs, with one called "Corporate and Financial Management Trainee Program " for those with qualifications in Accounting.
So your claim that, all else equal, an arts/law grad has a higher probability than com/law grad of getting into DFAT is becoming all the more shaky.
What's this aggregrate based on? Sorry, it's just that from most Law students I've spoken to, they feel that either degree offers a similar amount of pathways. Indeed, with a lot of business-related aspects being covered in Law degrees - courses on tax, corporations, bankrupcy, takeovers, etc. - most Arts/Law students will still be able to pursue many of the pathways that Comm/Law students take. Of course in some cases the additional study that a Commerce student has undertaken may make them the more viable candidate for the job, though that would heavily depend on the major of the Commerce student and the job in question.
There are of course jobs at DFAT that require accountancy, but the foreign component indicates that profiency in a foreign language or two is highly important. About 50% or so of Arts/Law students that I meet at uni want to end up at DFAT, and are doing that combination because that it what is most likely to get them employed there, as told by employees of DFAT guest lecturing in their first Law course (Foundations, I think).
I will of course concede that Commerce graduates generally have more employment opportunities than Arts graduates. But that's irrelevent when talking about double degrees - if you're going to look for employment in areas that don't need a Law degree, then why study for one at all?