the longterm steady nature of infrastructure investments has been instrumental in endearing it to markets making them the chosen class for institutional financial investors such as insurance companies pension funds sovereign wealth funds and other foundations weber et al first estimated infrastructure investment gaps in each country discussed above are taken to imply a financing gap of a similar order of magnitude second it is taken for granted that national public sectors in most countries are financially constrained with limited budgetary resources face governance problems and run the risk of running into debt sustainability issues if they undertake infrastructure investments on the scale needed in the coming years