Homebuyer scheme on shaky ground as calls for help echo

Queensland's stamp duty changes are a 'stark example' of the tax's impact, the e61 Institute says. (Jono Searle/AAP PHOTOS)

A new plan to help aspiring homeowners crack into the housing market with as little as a two per cent deposit is on shaky ground with opponents being urged to back a new scheme.

The Greens have come out against the Help to Buy shared equity scheme where the government would contribute up to 40 per cent of the value of a home for a new property or 30 per cent for an existing one.