"When companies get on the treadmill beating the drum for more earnings growth, it's very tempting to invest too much capital in unrewarding, mature or risky businesses, " says Bennett Stewart , senior partner at the Stern Stewart consulting firm.

FORBES: Whats the Hurry?

That means the Sunday "golden oldie" slot - previously taken by the likes of Rod Stewart, Tom Jones and Tony Bennett - will be vacant after organisers said they could not afford Bryan Ferry.

BBC: Big and bold at Glastonbury