your not holding the 1million in a bank account for 10 years doing nothing.
I don't get how you think inflation effects them both the same.
Because it literally does - you're talking about the same universe, same time period... what has changed with regards to inflation? Why would the rate of inflation be different in the universe where you pick the lump sum vs picking the monthly payments?
it only does that if you sit on the 1mil
Nope, whatever you do has absolutely no impact on the rate of inflation. The effect of inflation on the relative worth of £1 in 10 years time, in either scenario, is literally identical, your tiny choices here has no substantial impact on it.
It doesn't matter whether you invest that 1 million in the stock market or stick it in the bank, it's a drop in the ocean, the inflation rate is literally the same.
Tell you what I'm buying 1mil of intel right now (but not really)
bump the post in 10 years.
then compare it with buying 10k intel shares every month for 10 years
What does that have to do with the overall rate of inflation?
I think you're nearly getting it here - see what you're comparing there is the result of the two investments right? Why do you need to look at inflation? In 10 years time the result of doing that will give you an amount in £s for either choice... those amounts can be compared directly.
It's utterly irrelevant whether the rate of inflation was 2% or 3% or 0%... all that is of interest is how many £s you have in 10 years from scenario A vs scenario B.
If you think otherwise then explain why £1 in 10 years' time is worth a different amount in one scenario than the other or why the rate of inflation is going to be different in one scenario or the other?