toddler.. you don't need lots of baby boomers to die or downsize in order to effect the market you are right, but you need enough of them to do so at the same time, enough to create enough of a surplus in order to force prices down. Now the scenario which you are describing takes place of 10-20 years which means that there must enough continuous supply across this time in order to permanently lower prices, which I don't think will occur.
You are correct about the assets being sold in order to fund care homes, but in the current era people stay in their own homes for far longer than they used to, which means that supply will still be lower than demand.
Defining demand, as you have, you have identified a very good point, people being willing and able to pay ( what actually is called effective demand), there appear to be a larger number of peple who are willing and able to pay at certain levels than there is supply at that level, which keeps prices high
Your rather mean spirited remark about using GCSE business studies and over simplifcation is rather erroneous to be honest. The housing market, which is a micro market, is down to supply and demand.
I think your predictions are based on a number of determinents all acting in the same way on the market at a similar time.
But who would it benefit even if it did?
A large house price fall would have to be caused by some sort of economic shock, so lets say that occurs and house prices in London fall by 20 %.
That means that the £500,000 flats along the road from me would now be worth £400,000 still out of the price range of many. But this would have a rather large economic impact. The number of people in negative equity would grow, which means that two things will happen, people will either sit tight where they are and hope for a future increase, only those who have to move will do so. Also the number of reposessions and bankruptcies would increase, now this has a rather large macro economic effect.
First, consumer confidence will fall, consumption (65% of AD) will reduce, the effect on investment will be the same and this will reduce too. A mass recession ensues, unemployment rises, and many of your people who are looking to buy a house now will unable to do so, keeping them in rental property.
Oh and the demand for rental property increasing means that rents go up...
Finally because there are so many reposessions, and the banks have been forced to write off so much money from their balance sheets where the asset is not worth the money paid, banks will be far more cautious with mortgages. The level of deposit needed will increase and multiples of salarly allowed will be lower, effectively meaning that many people are still priced out of the market.
So who benefits? The cash rich are one stakeholder that benefits here, secondly foreign buyers ( who are cash rich) are more likely to invest in London property even if their own economy has been effected because it would still be seen as a good investment.
What will also occur at this point is the number of people coming to London to find work will increase due to the economic shock meaning the demand for housing rises and as a result the house price fall is likely to be short term, rather than a long term readjustment as eventually prices will begin to rise.
Your predictions may be correct, but I think that you are looking for reasons that the market will crash, and are hoping for a set of circumstances to happen together to cause this. For it to happen in a way that there is a long term readustment to prices in London would be catastrophic for the economy, and it would benefit no one.
Oh and there may be a coming crisis in pensions, but your analysis is flawed in some ways.
The modern baby boom pensioner is far more likely than previous generations to have a private pension which means that many of them are likely to continue to pay tax which was not the case in the past. This means that the tax take will probably not fall at the same level as it would if they were all retiring and living off the state pension.
The private pension level, and the number of boomers with assets to liquidate will also lower the liability on the state, they will pay for more of their care than their parents generation.
In any case only 25% of the entire tax take is from income tax, 50 someting percent of it comes from indirect taxation, which boomers will still continue to pay.
I can forsee the situation that things like heating allowance, free bus passes etc either being cut, or being means tested to reduce spending, and as you know across the next 20 years the pensionable age is set to rise anyway, which again reduces some numbers and the size of the bill.
Also the population growth through net migration will reduce some of the liabillity on the British worker of such things.
The basic population elements of the London issue will cause house prices, if not to rise, to remain where they are.
You can say a lot about me, but I do know my economics...