There should be no place or need for families to rent privately in a modern G8 country. It's despicable what the BTL scum have done to ordinary people.
SaucyJack I suggest you get yourself over to Brussels and the surrounding areas, where there is a massive private rental market. We rent abroad, as dh has had jobs over here (HM Forces and now civvy) since 2004. If he hadn't been able to rent, where would he initially, and then us, when we moved over, have lived? We didn't know how long we would be here for, and so sub let from the MoD, and then, when he got a civvy job here post retirement from the Forces, rented privately. We are only here for a total of six years. You need to be in Belgium for about 10 years before you turn a profit on a house due to the extortionate VAT on buying property, and we want to return to our house in the UK, so we rent that out whilst we are abroad.
There are many people here employed by NATO, the EU, the HQs of places like Toyota, GSK, Huntsman etc, plus those serving their particular countries, so Armed Forces personnel, diplomats etc, who all move regularly, and need to rent as opposed to buy. It's the same in all major cities, be they G8 countries or not. Not everyone wants to buy where they are posted, or can afford to, given that many jobs involve moving to different countries every couple of years.