I'm not sure what you're saying then when you say, "Did a "few individuals" force millions of households across the Western world to get up to their scalps in debt, buying houses, holiday villas, cars, consumer durables, etc, that they could not realistically afford? Did a "few individuals" create huge speculative property bubbles on a global level too?".
If you look back over the history of both industry pressure and public policy, the answer is a plain and emphatic yes, they did. When you give people enormous discounts - 70-80% of the market value - to get into debt to buy their own council house, when at the same time you create, in effect mortgages on 120-150% of the market value and 3-5x income multiples to encourage people to chase a housing bubble, and when they then bundle those mortgages up into securitised, tradable assets, changing them from balance sheet liabilities into assets, then yes, the whole housing bubble was created by a comparatively few individuals.