The trouble is that all of the above says very little.
People's finances depend on lifestyle / spending to a large extent.
More importantly two people on the same income could have completely different finances.
eg two people earn £25k. One is 22 with a huge student loan. One is 40 having bought their first home in 1995 and inherited £300k 5 years later. One is scraping by, one is loaded.
Eh?