The government are under pressure to limit the immigration into this country, they see that the non EU route as the easiest to implement changes.
Similar to the proposed child benefit cap, the government seem to think by putting a single figure for salary that this is the best option?
With the increase in the cost of living, such as, fuel prices rising, high utilities bills and with most other basic needs increasing, it could be seen that £26,000 may be needed to support another person.
The amount should not be based on how much you earn but on your expenditure. By providing the 6 months of bank statements, they should show the regular income going in and a positive balance after the monthly outgoings.