The Greens' Chlöe Swarbrick says tax policy has been used before to create a better society.

The Greens today launched their alternative Budget,  which includes a 2.5 percent tax on individual net wealth over $2 million.

It would help pay for policies like free GP trips, free ECE and an Income Guarantee. 

Swarbrick says after World War Two, higher taxes helped fund public housing and schools. 

"That created a period by which even those who were having a hard time were able to participate in society and get the necessary social mobility so that they could live a good life in the future."

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