Full Idea
I suggest that Lewis's view in fact is just Meinong's view. ...Meinong distinguishes between 'existing' and merely 'subsisting', Lewis between 'being actual' and merely 'existing'.
Gist of Idea
Lewis's distinction of 'existing' from 'being actual' is Meinong's between 'existing' and 'subsisting'
Source
comment on David Lewis (Possible Worlds [1973]) by William Lycan - The Trouble with Possible Worlds 06
Book Reference
'The Possible and the Actual', ed/tr. Loux,Michael J. [Cornell 1979], p.288
A Reaction
Lewis attempts to make actuality purely 'indexical' in character, like distinguishing the world 'here' from the world 'elsewhere', but Lycan seems right that he is committed to more than that.