For some regions contributions from individual collections are plainly not feasible (either because of economic constraints and/or legal constraints on how funds can be allocated). An option that could be considered are weighted contributions, where larger institutions, or institutions with more liquidity, can take care of the cost of those who are unable to contribute. This may require some level of altruism, which should not necessarily be expected, but a set of incentives could be recognized to foster such a system (a working example of this kind of system is Arctos). A combination of different funding systems may not be a bad idea either. There could also be special funds for particular regions according to the local needs.