"It's more political," he told reporters.
The Punjab Congress rushed to the Union Finance Minister while the ruling SAD called for a special session of the Assembly (scheduled for May 3) to deliberate on the issue of wealth tax, he said.
"It's (the action of political parties) is meant for public consumption," he added.
Manchanda said the concept of wealth tax was not new. "It's some 10 to 15 years old."
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"Wealth tax is generally imposed on urban land, jewellery, cash etc," he also said.
Manchanda admitted that his office needed more teeth to counter "inefficient officials" in the I-T department.
As many as 375 complaints, including around 300 related to refunds, were pending with his office for disposal.
The Centre's proposed decision to impose wealth tax on such farmers has created a political storm in Punjab with both SAD and state Congress opposing the decision.
The Punjab Congress leaders led by state party chief Partap Singh Bajwa had met Union Minister P Chidambaram in Delhi over the issue.