I think it depends on the person, as well as their level of funcitoning.
husband has aspergers, fairly high functioning for the most part. He's 58, spent 14 yrs in the military, does have a tendency to lose a job after about 10 yrs. Up until about 3 or 4 yrs ago he had major issues with managing money/paying bills. Since mother in law stopped recueing about 6 yrs ago, and I've cracked down and stayed on him (watching over his shoulder) I've seen marked improvement. At least we haven't had any utilities shut off in about 5 yrs now. I did all the bill paying for years, but when he kept making checks bounce all over town by sneaking money out of the bank, I made him assume the job.
I honestly don't think husband would've ever managed if it hadn't been for the military. The strict regulated environment did wonders for him. And he really still has trouble outside of it.
Then there is my son Travis. Much more severe with the Pervasive Developmental Disorder (PDD), but then you also have to add in the other disabilities.
But I think if it weren't for his other problems, if Travis could learn a routine to daily living he'd be okay for the most part. He'd probably still have some major issues socially, though.
husband still doesn't like the diagnosis. Nor does he like that he and Travis are so much alike. lol I swear, they really are. Just Travis is more pronounced and worse in many ways. Actually it's pretty common on husband's side of the family. I can see traits in his brother, when I think back also in his Dad, His cousin is DEFINATELY aspergers (and he's a History professor!) I know another cousin probably is too.
We are still working toward Travis living independently. If he's unable to, the family is already planning for his future. At the moment easy child has already decided the next house she buys WILL have a room for her brother.