gulliver- I think this may help correct any misunderstanding
you may get some answers here. There are some quite valuable protections.
https://www.gov.uk/workplace-pensions/protection-for-your-pension#:~:text=Defined%20benefit%20pension%20schemes&text=You're%20usually%20protected%20by,below%20the%20scheme's%20pension%20age
If your employer goes bust:
Defined contribution pensions are usually run by pension providers, not employers. You will not lose your pension pot if your employer goes bust.
Some extracts here are relevant:
You’re usually protected by the Pension Protection Fund if your employer goes bust and cannot pay your pension
If your pension provider goes bust:
If the pension provider was authorised by the Financial Conduct Authority and cannot pay you, you can get compensation from the Financial Services Compensation Scheme (FSCS).
Fraud, theft or bad management
If there’s a shortfall in your company’s pension fund because of fraud or theft, you may be eligible for compensation from the Fraud Compensation Fund.
None of this is relevant to the OP though- just to gulliver's post