* 22K is the median salary. The people under 22K get propped up by social security up to around that amount (theoretically, practically not)
* top-20% percentil starts at 38K
* top-13% is 45K (relevant in the UK as it is the limit for high tax bracket)
* top-10% is 50K
* top-5% is 70K
* top-2% is 110K
* top-1% is 160K
The average cost of a house is 250K, 400K in London. Only the smallest fraction of the population will be able to get that amount of money from just working. You need to be propped up by something, your parent, luck, post-code lottery on your first ring of the property ladder, ...
You need to borrow from the future and the past to afford the present.
edit: formatting
edit2: all amounts are in GBP.