Releasing the party's South Island high country policy, Labour land information spokesman Iain Lees-Galloway said the benefits of tenure review had been "substantially achieved", with 11 conservation parks added to the public estate.
The policy also promoted a process to look at the protection, management and development of the Mackenzie Basin.
Labour was committed to protecting the basin from "inappropriate water use and irrigation" and would explore the creation of a drylands conservation park in the northern basin, Mr Lees-Galloway said.
It would also identify public access ways through high country land, retain the existing high country lessee system of charging annual rent based on 2% of the land value (exclusive of improvements) and address rent affordability "where necessary", he said.
But Dr Rolleston said the policy would force farmers off their land and the taxpayer would have to take on the responsibility of looking after the fragile environments.
The policy would override the Resource Management Act and directly contravened the Land Tribunal judgement which, in 2009, quashed the previous Labour government's attempts to hike high country rents above a property's productive capacity.
"It also attempts to put a bulldozer through the 2009 High Court decision on pastoral leases declaring the lessee or farmer had the same absolute title rights as any other landowner or lessee," he said.
The policy failed to acknowledge the enormous amount of work and investment made by farmers to rid their land of pests and weeds.
It did not take into account the "huge tracts of land" which had been protected under QEII Trust covenants or set aside in tenure review for future generations of New Zealanders to enjoy, he said.
Federated Farmers high country vice-chairman Chas Todhunter was disappointed potentially affected farmers were not consulted in the formation of the policy.