There are two reasons for communists enjoying long innings in power. First is their Org Structure: They are highly disciplined and have strong org structure down below upto district and mohalla levels, where their representative would know each and every one in the locality by their names, conduct and political preference. If you are with them it's fine else you are the odd one who will face all the problems while doing even sundry issues. Second issue is the Bangladesi migrants whom they embrace and empower them with all the national rights and benefits comes with Indian Citizaenship. So it's not about policies or work they do, it's more to do with using the power to be in it like the old slavery system.
