Another post based on ignorance. Your occupational pension fund should you die before claiming it will be paid in full to your nominated beneficiary (usually wife) and tax free. Even if you die while receiving it often 50% of your normal payments will go to your spouse until her demise under most schemes. The state pension which is entirely separate if you die before retirement age will simply not be paid under current rules. There may separately be widows benefits but your pension is exclusive to you.
The real issue is that many more people are living considerably longer than when the actuarial tables were drawn up ,hence the increase in retirement ages. But generally not enough was paid in NI to cover the real costs.