What is the ruling on subscribing to a supplementary pension scheme from which a monthly percentage is deducted from the employee and to which the company contributes, and the amount is invested in a bank from which an income is taken and added to the pension?

It is forbidden to participate in the optional retirement scheme if it involves depositing money in a bank in exchange for interest (riba). It is also impermissible to take the profits resulting from it. Furthermore, there is another concern if the scheme is affiliated with a private company, which is the presence of excessive gharar (definition) (uncertainty/deception), in addition to the company benefiting from the scheme, which removes it from being based on cooperation and mutual support.