There's definitely some porkies told on here.
90% of the UK adult population earns under £60k pa. You are in the top ten percent of people if you earn over that.
0.1% earn over £100k. So it's roughly about 650,000 people-ish, and most of those people will be men. Sorry, but it's true.
The quoted poster who said they saved £1400 a month, well, that's a pre-tax earning of what? £18k pa? So you are looking at a couple that can relinquish £18k of their combined gross salary a year into savings.
There are a number of viable ways to do this, in my view. 1) They live off one salary and save the second. 2) They live very cheaply, ie. no mortgage and both earn reasonable salaries. 3) One of them earns a shit load over £100k, and they live cheaply according to their income level.
In truth, very, very few people in the UK could relinquish £18k gross pa a year to savings. It's doable if you both earn average salaries or above, but it would tend to suggest no children and a very frugal way of living and no or small housing costs.
DH and I did it with about £10k to £15k for seven years when we were in our 30s to save for a deposit. We earned over average at the time, and I did shit loads of extra freelance. We had no children, our rent was cheap, and those years were fucking miserable - - to the point where it damaged our marriage and our mental health quite a bit. It was necessary at the time, but it ruined our 30s and those are years we can never get back.
I have a very varied circle of friends and acquaintances across the country and across wealth levels. Out of hundreds of women, from Oxbridge-educated women to the wives of businessmen to doctors to teachers, MPs etc, I only know one woman (30s, no kids) who earns over £100k pa and she works in the City.