>Mountain glaciers serve as a crucial buffer as they help to provide water (as melt water) when rainfall is minimal or nonexistent (Vuille et al., 2008), such as during the dry season or during drought conditions. This implies that some melting is necessary to fuel the existing hydrologic processes and fulfil consumption needs.
To be fair, Venezuela hasn't been able to feed its people properly even WITH these glaciers (not to mention the enormous oil wealth.) With a functioning economy, you can overcome a lot of natural obstacles (see Singapore).