FWIW, this is a very US-centric view. In the UK, you will usually do an MSc + PhD in 4.5 years: 1 year for an MSc and 3.5 for a PhD. You can double that time if you want to do it part-time, in which case you can continue working.
Oh, i get it. I misread it as:
> but you've got an entirely different problem that you could be out of the workforce in between 5-10 years