The Scottish Greens want to enter a coalition government with the SNP after the Holyrood election and push through an array of tax hikes for the wealthy including a new "millionaire's tax", their co-leader has said. Patrick Harvie said his party "aspired" to enter government after May 6 if Nicola Sturgeon fails to win an outright majority as he unveiled a manifesto backing her plans for another independence referendum. Although he refused to set out his policy “red lines” for a coalition deal, the Green manifesto set out radical proposals to hike income tax for wealthier Scots and replace council tax with a levy based on property values that would also increase bills for the better-off. In a triple whammy, one in 10 Scots would also face a "millionaire's tax" levied on everyone who owns property, land, pensions and other assets that together are valued at more than £1 million. In addition, businessmen who have to take regular international flights for their work would be forced to pay an escalating tax on their tickets and a "windfall tax" imposed on companies deemed to have made "extraordinary profits" during the pandemic. Mr Harvie also unveiled proposals to ban homeowners from selling older properties until they spend thousands of pounds making them more energy efficient. Among their flagship rural policies are a total ban on fox hunting, forcing all "significant" landowners to be subjected to a public interest test if they want to keep their property and allowing community groups to purchase their holdings at below market rate. Opinion polls have indicated Ms Sturgeon's SNP is on the cusp of winning an overall majority but may require the support of the pro-Greens if she falls short.