No the pension must not be stopped this is the only hope to the retired people it is giving light support to their old age.
This is not a question of support in old age. Rather this is a matter of right. Pension is paid for past service and this is considered as 'deferred wage'. Thus this is just like salary and is a right. This is not social security measure.
There are different types of pensions. superannuation and retiring pension are for past service. family pension is paid on death of a serving or retired person. These cannot be stopped except for future misconduct.
There are also old age and widow pension, which are social security measure. These depend on financial position of government and sanctioned accordingly.