Teal independent Allegra Spender is working with crossbench senator David Pocock and others in a bid to stop the government taxing unrealised gains as part of its planned tax rise on superannuation accounts worth more than $3 million.

At the same time, the lobby group for self-managed super fund holders has met Senate crossbenchers in Canberra this week with a proposed amendment that would strip out the taxation of unrealised gains.