there is no general duty (neither in contract nor in tort) on an employer to give his employees financial advice in relation to benefits accruing from their employment or generally to give them advice to safeguard their wellbeing. Each case must be decided on its own merits, but in general terms it is true to say that the law does not expect employers to take on the role of being financial adviser to their staff.
For relevant general notes see Implied terms in employment contracts/duties of employer