In the UK, there's the state pension, long story short, the value at state pension age was based on your contributions (National Insurance) and wages through your employer(s) PAYE (Pay As You Earn) accounts. You could also have a private pension that you paid into. Some/many companies offered/provided a pension that they contributed to, but you couldn't pay into a company's pension and private one at the same time.
Then, companies are forced to offer a pension. So a company has to tell a Pension Body the pension fund and employees. The PB writes to the employee if they want to join, it's not up to the employer. The employee can opt not to join. The pension fund has to be recognised by the PB, called a Nest pension. Then the employer and employee contribute a certain percentage of he/she opts in. This percentage is set to increase.
My prediction is, the government wans to scrap state pensions, so there will be a time where employees are in employer's pensions on higher contribution percentages.
Two things will happen. Automation increases further and there will be no full-time jobs. In fact, self employment/sub contracting will be enforced. Then the government will have to phase on clamp downs on that.