What will happen is that there will likely be a reset of the middle class weath that's been accumulated during the 'boom' years.
It's already begun, with the middle classes feeling the influence of inflation in the last year or so.
Essentially, the rich will take their real money (I'm not talking about ISA savings and crap like your local clerical worker's pension pot) and invest it offshore in places where the true value is less likely to be eroded. Gold has always been a good bet, but there are other things which can ensure longer-term protection. The rich have access to banking institutions, advice, and connections that others do not.
Whilst the wealth of the poor is less of an issue - since they never had any to speak of, they don't lose very much. I suppose in British terms, we're talking about the underclass and working class here - your typical family on duel NMW jobs, who don't have pensions or rainy day funds to lose value on.
And then there's your middle classes, who will witness the erosion of the bubble they thought they were safe in. They may have paid into a pension pot for the last 25 years, they may be employed in middle-senior management in government departments, they may have a second home and mortgage for a family home in the country. But essentially they still need an income from their day jobs, and whether they like it or not, they are the ones who truly stand to lose in the long term.
It's happened many times before; it will happen many times again. For one of the most recent examples, just look to Russia in the 1990s.