D.P: You don't need a degree to make it in life. Doing a crap degree doesn't mean you won't get a good job but you would probably have progressed just as well without the crap degree (and the debt)!! My cousin is pretty thick and got into Huddersfield without 3 Alevels (he got rejected from Lincoln ffs).
Someone I know was the thickest person I knew at school. He opened a 2nd hand cooker shop and now has more money than anyone I know.
The subject of the PhD is very important too. Someone I know of (only the name and the PhD) did a PhD in dance and then wonders why she didn't get a good job afterwards.
I can't really understand why anyone would do a Phd unless it was specific to their career or they were entering Academia permanently.