"The simple fact is the RMA has become cumbersome, uncertain and highly litigious. If these groups cannot understand this, then they are out of touch with everyday New Zealanders," she said.
"These groups need to get out of the office and talk to communities and businesses. They will tell them what they have told me - they are facing years and years of uncertainty while decisions are made whether a project can or cannot proceed.
"In most cases, it is not about whether a particular project can or cannot proceed, it is about the time and cost to reach that decision."
Adams also dismissed claims that the proposals unreasonably interfere with local decision-making.
"Councils have been let down by successive governments taking a hands-off approach to major issues for far too long. It has been hugely unfair on councils and it is now time for the government to step-up and offer more support. New Zealanders are looking to central government to show strong leadership."
In her critique, Wright said the proposals strengthened economic considerations relative to environmental.
"The RMA's fundamental purpose is to make sure that environmental effects are taken into consideration when decisions are being made about using our resources. It is not, and should not become, an economic development act.
"There is a sense in the changes that the environment is considered the enemy of economic progress despite the fact that a large part of our economy is built on our environmental credentials.