I hope Colm will confirm and comment, as appropriate. Personally, I'd be really interested in understanding how much is wasted as a result of point 1 above?
You're right that total costs should be massively lower under the smoothed scheme I'm proposing. Members will get the benefit of those lower costs.
There will be just one fund, which only needs to be valued once a month in order to calculate the smoothed return for everyone in the scheme (active and retired). In contrast, a scheme structured on the lines proposed by the DSP will need something like 50 default funds (pre-retirement), one for each projected maturity year, in addition to the low-risk, medium-risk and high-risk funds. Each of those funds will need to be valued daily. Investment strategies will need to be devised and then implemented for each of the funds - the mix between equities, bonds, cash, alternatives, etc. For the smoothed fund, everything will be invested in a cheap-as-chips passive world equity fund (at least in the early years). No messing around with asset allocation strategies, etc.
Workers won't have to choose, either at the start nor at any later stage, what fund they want to invest in, with all the potential for mis-coding and resultant hassle in order to correct the errors. There will be no choice - everyone will be in the smoothed fund.
There will also be far fewer queries to the administrator. Can you imagine a workplace (say the local tyre repair shop), where workers discuss at coffee break how their fund is doing. Under the DSP's scheme, two or three people working side by side will have different returns on their funds, depending on their fund choice. Even two workers, both of whom have chosen the default option, may experience different returns just because of a difference in ages. In the smoothed scheme, everyone in the country (active and retired) will get exactly the same "interest rate" every month. It will be a live topic of conversation in pubs, hairdressers, etc. There will be no confusion.
As anyone involved in the business knows, reductions in unit price generate queries. Under the scheme proposed by the DSP, workers will see the value of their fund fall once every three months or so (particularly if they've chosen the high risk option). Current market value gets only a 1% weighting under the smoothed scheme. There will be a positive "interest rate" almost every month, resulting in fewer queries.
Volatility of returns also causes people to drop out. Brian Woods and I did a few back-of-a-fag-packet calculations, which indicated that over half of the 10 million or so claimed members of the NEST scheme have stopped contributing to the scheme. Drop-outs adds significantly to costs. There will be far fewer drop-outs under the smoothed scheme.
I haven't yet got near what happens at retirement. Speaking from experience, there are massive frictional costs at retirement under any sort of conventional DC scheme. Those almost disappear completely under the smoothed scheme. Everyone keeps exactly the same account. They just start drawing from it rather than contributing to it. Much the same happens throughout retirement.
It's getting late - it's already tomorrow! - so I must stop, but you get the message: costs are massively less under the AE scheme. Those lower costs must go to the benefit of the membership.