Some members post that they have a mole PROBLEM, that they are damaging crops and eating earthworms. Well, it's true moles are Mercenaries and charge a hefty fee in earthworms for their work, but I believe they have been exemplary member of the Garden Patrol in my garden... And judging by the number of earthworms I encounter every time I dig, pull up weeds, or even poke a hole in the ground (disturbed earthworms swarm out), my garden can afford the premium.
Here's a brief summary of their roles in the garden:
https://www.biokids.umich.edu/critters/S ... aquaticus/What roles do they have in the ecosystem?
Eastern moles are important predators of insect larvae and other invertebrates, they can profoundly impact the communities of their prey. They also act to aerate and turn soil where they live through their extensive tunneling activities.
Think of all the beetle grubs, cutworms, and don't forget the moth and other pupa that overwinter in the soil (such as tomato hornworms....).
The above linked website describes moles as solitary creatures with territories. That means there aren't that many -- or maybe there is only ONE -- in your garden. Yes, it's problematic if you also have voles that find and use the mole tunnels as easy access, but don't blame the moles for the damage voles cause.