According to a new national survey of 7,718 employees over 18, 34% of workers say they never plan to retire. The survey was conducted by Harris Interactive for Age Wave and The Concours Group. ''These people are the most engaged in their work, and the most productive,'' says Tamara Erickson, executive vice president of The Concours Group. ''They love work.''
   At the same time, workers plan to be creative with their later work years, with 12% of those who plan to keep working that they plan to work full time, 39% wanting to work part time, and 49% desiring periods of employment, followed by periods of leisure. This ''periodic'' retirement plan favored by the majority shows that employers will have to rethink retirement, Erickson says.