In recent times whenever a new spinner has come along everyone is always focusing on how turn he gets like it's the only thing that matters with a spinner.
And in fact one of insults always hurled at the England team by WUMs is along the lines of "OMG giles isn't a spinner because he doesn't spin the ball LOLOLOLZ".
But turn isn't always everything, many good spinners in the past Underwood, Prasanna, Edmonds, Emburey, Tufnell, Gibbs, Richard and Ray Illingworth, Titmus, Symcox and even Saqlain Mushtaq got most of their wickets through accuracy and variation and if one turned massively that was a bonus.
Murali himself only got better when he developed variations, the fact that he got turn them massively was pointless after the batsmen adjusted to turn.
Especially in India where the batsmen are used to the turn i mean for example Shane warne and Abdul Qadir both where massively dangerous leggies who turn it a mile but got plastered by the india batsmen because of their inaccuracy, compare that with Underwood and Benaud who where both miserly accurate and often out bowled the Indians themselves.
Therefore despite the name there's a lot more to being a spinner then spinning the ball although it may be important variation and accuracy are also important.