http://www.municipalservicesproject.org/sites/municipalservicesproject.org/files/publications/Lipschutz-Romano_The_Cupboard_is_Full_May2012_FINAL.pdf Attached for you information is a link to a paper ,
recently brought to my attention, prepared by the municipal services
project out of Canada
The publication is well worth a read , you will also
find reference to the use of public pension (superannuation) funds at
page 15 …Whilst the paper is target at developing countries funding
there are a number of arguments relevant to all countries