ISAs are important for rainy days and for those trying to avoid clawback of personal allowance. However the tax free lump sum makes pensions more tax efficient regardless of your tax rate.
People seam to miss that although SIPPs and ISAs are equal for basic rate tax payers on in/out tax relief the lump sum sweetens the deal to make pensions the most efficient.
Without this sweetener why would you give up access (unless because you are lacking discipline).
