Just have a study about SRS.
The only benefit is tax saving, for those pay more than $80k, saving for the part put in SRS will be 11.5%.No higher interest rate.
Have to lock till age 62, but 5% penalty is still lower than 11.5% tax saving. Especially, when take it as emergency fund, the worst, lose job and no need to pay for higher tax.
I think property investment is another key consideration. Because that needs huge sum of cash.
So I think people should do it after having 2nd or 3rd property. No restriction on stock investment.
The last question is, how to compare with SA? I remember we can make voluntary contribution to CPF too, higher interest rate, no early withdraw.