If an organisation is running a competition for HEOs and panels dozens of people, they'll be happy to just offer it to the next person down the list, if the first person says they won't start at the bottom of the scale. That's just the way the civil service works. They run a merit / competency based competition, and from their perspective it'd make no sense to appoint person number 1 at 47k, and so on down the list until number 10 says "I'm a big shot and I'm not taking a drop in money to slum it with you guys" and they get to start on 53k...
There is a degree of flexibility when a single specific position is being recruited for, and in order to fill the position it's considered that it may be necessary to take someone in above the bottom of the scale.