Mick Jagger attacks former financial adviser over Rolling Stones Book He became the band's adviser in 1968 when he was running a merchant bank, and admits to becoming fascinated by Jagger, despite hating the Stones" music. The frontman had complained of being penniless, he realised that if they were to avoid paying between 83 and 98 per cent in tax and surtax, they would need to become tax exiles and move their base away from England. It was around the time they were recording their best selling album Exile on Main Street, one of the only album titles, the Prince said, to contain a reference to tax planning in the title. With "unaccounted-for cash delivered in a paper bag to the band and their management the norm," Prince Rupert began insisting they declare it, and slowly began rewriting how tours operated. Even he, though, had to admit defeat in the "all pervasive" practice of ticket scalping, which allowed promoters to make huge profits by reselling concert tickets at inflated prices. He said: "Everyone I spoke to said: "There's nothing you can do about that. Do you want the Stones" children to be kidnapped? You should be aware you are dealing with difficult and dangerous people. Prince Rupert puts his success with the Stones down to hating their music and refusing to be tempted by the rock and roll lifestyle. He said: "All the time I worked with the Stones, I never changed my habits, my clothes or my attitudes. I always aimed to maintain a strict discipline backstage and tried to see that the band and the entourage did not get drunk or disorderly. Precisely because I was not a fan, I was able to view the band and what they produced calmly, dispassionately, maybe even clinically - though never without affection. The Prince and Jagger became great friends and it is believed that without his guiding influence the Stones would not have lasted nearly as long as they have. The man nicknamed Rupie The Groupie by associates said the job with the Stones - who had never heard of before - came at the right time as he was bored at work, and he could not resist taking on the challenge of a skint rock band. He and Jagger quickly clicked, but coming from different ends of the social spectrum was not without its problems. Prince Rupert recounts how he and his wife, Josephine, had been invited for Christmas at Warwick Castle by friends, Lord and Lady Brooke. Having got Jagger and Marianne Faithfull an invitation, the visit was a disaster, with Miss Faithfull staying in bed 90 per cent of the time and Lade Brooke eventually leaving early and tipping water into her bed. He also described a concert in Hyde Park soon after the band's guitarist, Brian Jones, had been found dead in 1969. He said: "Mick read extracts from Shelley's Adonais. The effect was almost like the Nuremberg Rallies.