"It is very painful that even after the strike called by the workers crossing 20 days, the Central and State governments have not given its due importance. The employees have begun seeking support of party leaders," he said in a statement here.
He mentioned that representatives of workers unions recently met his son and party Treasurer M K Stalin and explained the issue in detail to him.
Karunanidhi said the labour unrest in NLC was not mentioned in the memorandum submitted by Chief Minister Jayalalithaa to Prime Minister Narendra Modi during his visit to the city.
"May be she neglected it because she thought it was only a labour issue", he said.
The employees are on an indefinite strike since July 20 following failure of talks with the management over wage revision and other demands.
