The "study" of Oxfam is here http://www.oxfamfrance.org/sites/default/files/file_attachments/rapport_oxfam_insatiable_richesse_0.pdf
(albeit in french)
It's based on a true study from a swiss bank the "Crédit Suisse" whose methodology has also been since criticized.
So here are a few numbers if you want them.
30% of the world's population has more debts than possessions. Meaning if you have no debts and living on the street, you're technically richer than 30% of persons.
To be considered part of the 50% of richest people in the plant, you need to have 3000 euros of active worth. meaning if you own a 2002 toyota corolla and live in it, you're a rich bastard.
As for the 1%, to be in it you need to have a net worth of 650 000 euros
. So yeah, if your grandpa lives near a city, chances are his house is not far from that value. I'm not saying all retired people are part of that 1%, far from it, just that the "1% of richest person on earth" is not a bilionaire living on his yacht. It's a normal dude who spend his life working a good enough job, bought a house, a car and a nice tv.
Now, again, I'm not saying that there is'nt a problem. The wealth gap is at its highest in...well ever, and some of the problems pointed out there are quite valid. But for the most part, it completely miss the point.