NSW Greens have announced their intention to introduce laws that would ban mining companies from making donations to political parties.
Greens MP John Kaye plans to introduce a bill this week which would extend the bans on donations from tobacco, alcohol, gambling and property development industries to mining and other companies with government contracts worth more than $50,000.
Kaye claimed Coalition and Labor governments had generated ''substantial, and in many cases proven, allegations of corruption and influence peddling'' when dealing with industries that could benefit from their decisions.
Last year, unions successfully challenged in the High Court the government's ban on corporations and associations donating to political parties. The court ruled the ban and related spending rules curbed freedom of political expression.
Kaye said his proposal was more likely to survive a challenge because it targeted ''integrity-risk'' companies that could gain substantially from government decisions.
The move by the Greens follows the announcement of corruption inquiries into former energy minister Chris Hartcher and two other central coast MPs.
NSW Minerals Council chief executive Stephen Galilee said the proposal was an ''attack on the democratic right of 50,000 NSW mining workers and their families to support political candidates of their choice''.