I don't mind whether shops pass on the VAT cut, or save it for themselves - either way it benefits the country which is what I care about. I said this earlier in the thread.
It will benefit the economy more if the businesses do not pass the savings onto us. This is the part of my point you've lost in your haste to have yet another go (Although feel free, you've done it so often I'm pretty much immune to your sniping now).
Business is the centre of the economy, stable businesses employ people, employed people spend money. if a business choses to ignore the VAT cut and simply increase it's ex VAT price to leave current prices unchanged, it will benefit from additional revenue and zero repricing and readvertising costs. This will put it in a better position financially, give it less chance to go bust losing all the staff jobs, and crucially go some way to offsetting the increased operating costs now suffered by businesses following the 2p increase in fuel duty to offset the VAT cut.
Yes, I'm sure the shop staff can handle giving out extra change. But additional cash handling costs money - like it or not going through considerably more change than usual is going to increase expenses. Average transaction times will increase, cash handling charges will increase at the back office end of things, etc. Especially companies which normally sold things ending only in .99 so usually went through a shedload of 1p's and not a lot a lot else.
I would rather have a stable economy than £2.10 off my next purchase of £100. If that makes me an armchair expert then so be it. Ask me the same question in 5 years time when I've done amazing life changing things like pay a bill from NPower, pay my council tax or have an arguement with my landlord and I will give you exactly the same answer.
PS: Nice try on the armchair expert car thing. How many have YOU driven this year?