Temjin - when this came up the other day I dug out my latest mortgage/loan agreements, contract etc and went through them. There is no "all monies" clause or anything like it that is applicable! I don't believe the post you just referenced is correct - sounds more like what happened in the 30s/GD, not the 90s recession, which was one of the reasons regulations were brought in around this sort of thing. Or else the examples being cited were in fact for UNREGULATED loans where they had been taken out as a business loan etc with the house as collateral for the mortgage.
As stated in my previous post, any "regulated" mortgage, as per the Consumer Credit Code, which is just about all residential mortgages, including equity manager facilities etc (which I have), does not have this ability you guys are all going on about. An "unregulated" mortgage (which might include business loans and such), does have such provisions. I think this is where everyone get's this idea from.