No, NEET stands for "Not Employed, Educating, or Training" and Hikikomori translates literally to "Pulling Back In". Both phenomena result in the individual abdicating his productivity in deference to pursuits such as resolving crises and introspection.

Tang Ping on the other hand is a phenomenon where the individual only produces as much as his environment demands of him. If he contracted with his employer to work 9 to 5, he will work 9 to 5 and not a second more. If his work description is producing Powerpoint slides, he will produce Powerpoint slides and only Powerpoint slides. If he is remote work, he will quit rather than come into the office. He will then use the freed up time and energy on other pursuits he deems worthy.