What are the advantages and disadvantages of using the gatekeeper system in terms of progressing through the levels of care?

Thinking about this from both a provider’s and a payer’s perspectives, answer the following questions: What are the advantages and disadvantages of using the gatekeeper system in terms of progressing through the levels of care? Provide an example of each perspective. What are at least 2 advantages and 2 disadvantages for each group? Provide a rationale for your choices.