I think it could be fear of being out on your own, being in debt to your parents, living with them and not being able to start a job keeps you tied to your parents. It could mean you fear being in control of your own life, or that your parents fear it, that you will no longer be their child in need of their protection, guidance and quite bluntly their control. That if you grow beyond these things that the love will be gone too.
When I was younger my father expected to know exactly where I was, why I was going there, you know the "you live under my roof rule". Moving out of home meant I was promiscuous (also if I stayed out late). I left home at 23 when I married, moving into a flat with my new husband - my father had been insisting that we live with them, wasn't going to submit my husband to his rules. A week after we married he rang us for some reason and found we were out, he then rang around to my inlaws and a few other people to find out where we were. He actually got upset that I had gone out without telling him where I was going, I had to tell him that I no longer had to ask his permission. Even 20 years later he still does it, he thinks we should run our life the way he's run his, things like never change jobs, afterall he was miserable in his job (and it showed) for over 45 years so why should anyone look for a better job. Even to the number of children I had by a certain age, he had 4 children before the age of 29, he was upset I had chosen to have only one by the same age.
The ties that bind are very hard to cut, you don't want to cut all of them only the ones that make for an unhealthy relationship with your parents.