You can't milk a system, if there is no system to milk!
You're kind of missing the point here. Who says a system is needed?
Actually, if you read the Law, God had a great system. Do you know what should happen to the disabled, widow or orphan? Family takes them in and they had to help out. They were called "slaves." An evil word today, but back then when John and I first became disabled either Dad or one of my siblings were supposed to take us in. And, where as we cannot do a 40 hours work week, we can help with the housework and meals. I'd rather be a slave to family then worthless and a money pit to the government.
Back in the days when Israel was observing the real law, we would have come up with ways to add income to the family. I'm good at crocheting and gardening. I'm also pretty good at baking. I could sell what I made, give 90% to the family pot and keep 10% for myself.
Seven years later, we had the choice of whether we could afford to go back on our own again, (with that 10% saved in those seven years), or to stay on.
As for milking the system? May I safely assume you have family? If so, are they stupid enough to let you milk them for seven whole years? We might be able to pull the wool over their eyes once or twice, but it is usually safe to assume family catches us first. lol
Seems to me, if Christians work this out to going back to the Bible the only thing that should shock them beyond measure is to realize they owe family enough to bring them in and take care of them when the chips are down. And, in reverse the ones being brought in and cared for owe taking care of the family that gave them a home.
I know my family. Two out of six could afford to take us in. Unfortunately, I know my family. None of them are Christians, so we living with them would be just as tough as them living with us. On the other hand, it beats living off of the US government! (And, dagnabit! We paid into that program for 50 years, so we're not simply taking without first giving. The government that now takes care of us has managed to take most of the money we did have, because of their rules.)