Implementing remedies almost always involves other departments, their budgets, and their staff. The quality team needs to present very solid cases for improvements.
Quality problems are identified and impacts assessed at a granular level. Trying to get implementation commitments on individual issues generates a great deal of resistance. Issues need to be combined into change initiatives that have a bigger impact on the value returned to the corporation. This also leads to efficiencies in implementation.
The data quality assurance team needs to monitor implementation because items often get accepted for implementation but never get done or get done improperly. This is another reason for periodic reviews of all open issues. You need to keep the problems highly visible until they are no longer problems.