in context it is natural average expenditure on pensions and expenditure related to ageing will increase and will become ever more difficult to provide pensions
In this context it is natural that average public expenditure on pensions and expenditure related to ageing will increase, and it will become ever more difficult to provide adequate pensions.
In context it is natural average expenditure on pensions and expenditure related to ageing will increase, and will become ever more difficult to provide pensions.