I'd be surprised if it would push the status in to elitism - for example, the cost of painting a wing can be many times higher than the wing itself. Even the cost of the paint (without any labour) now makes a £60+VAT (paper thin) wing seem too cheap.A £300 wing if as good as the original would be a godsend but if this quality for a price were projected across the full range of 'poor' parts we currently tollerate then this surely would push the Minor into the 'elitist' sector that you seem to decry.
If someone wants to DIY restore a car, surely a £120 wing with visible flaws isn't what they want? I could be wrong but if paying a specialist to restore a car to a good standard, having decent panels makes the restoration cheaper!
If I had to pay twice the price for parts, but got parts of original quality it would save me money too. I get fed up of replacing dodgy 'new' parts with more rubbish new ones. When the supplier tells you that it's your own fault for buying them, there's not much else left to say.
If sill panels had slightly better grade of steel, and included drain holes (as per originals) then many many hundreds of Minor owners wouldn't be faced with an expensive shock a few years down the road when they have rotted through. (waxoil is of course not to be overlooked ;-) )
I remember asking what difference there was between pattern and AP master cylinder to be told that they get loads of pattern ones back under warranty, so I was happy to take the advice. Sadly that AP/Lockheed master cylinder was problematic from day one and was eventually re-replaced 14 months later

Obviously I'm biassed but think that good quality parts would save the owners money overall. I don't think it's ok that the customer has to do the quality checks that the manufactureer and supplier never bothered to do. I always open up wheel cylinders to look for swarf and regularly find some. I have not bought a new trunnion for >5 years without having to clean it and remove swarf etc.. etc..
The sad thing is that there is no way of telling which parts are worth buying, so how do you know if you are paying more money for quality or just over-paying for the same parts that other traders sell?
Minor engine parts are very much in common with other classics. Brake parts are not that specialised to be expensive. When it comes to tooling for specialised parts, I can never understand why such a strong club with a finite network of specialist traders can't all work together for the common good.
I agree - it's just a different state of mind. I used the word to differentiate the 2 camps as they are very different markets, but both suffering increased hassle and higher costs due to poor parts.'cheque book restoration' is not a dirty word