SW1,
I feel you're missing the point. Yes, Flexicrew gives you a job for 6 months. Yes, you will be type rated with 400 odd hours on type. Yes, you will be paid £1,000 a month for your work, which, after bills, rent etc doesn't leave you with much.
Do you benefit? Short term, maybe. Long term, no.
If you think that with a A320 type rating and 400 hours on type you are suddenly marketable to any airline, just ask the guys who were let go by easyJet and Monarch this summer. Most airlines are looking for 1,500hrs total.
So, now you've joined the pile of flexicrew guys who are type rated but with so few hours, they can't get jobs elsewhere. Meanwhile, cadets are still being wheeled off the production line, into the new flexicrew placements.
Really want to spend your life as a contract pilot? Good luck paying your loan back like that, let alone getting a mortgage.