Scottish independence is "wafer thin" and is largely based on the "political charisma" of Nicola Sturgeon.Veteran Nationalist George Kerevan said the party had been allowed to drift rightwards and was spending too much time trying to appease middle class voters.He accused senior SNP figures of wanting to placate a "conservative oligarchy" in Scotland made up of "lawyers, accountants, bankers, medial consultants, kirk ministers and university professors"."This group retains a unique, weighty, and