A "one-stop shop" to receive complaints about banks and financial institutions will be a focal point of next Tuesday's budget in line with the recommendations of an independent review of external dispute resolution schemes.

Pushed by Financial Services Minister Kelly O'Dwyer, the new body would replace the Financial Ombudsman Service and the Credit & Investments Ombudsman and might eventually replace the Superannuation Complaints Tribunal.

Labor says the government has lost the plot for accusing Bill Shorten of crushing aspiration. Credit:Andrew Meares

Finance Minister Mathias Cormann who is acting while Ms O'Dwyer is on maternity leave said the government would respond to the review on budget night.

The measures would be consistent with the recommendation for a "one-stop shop" model to resolve disputes to reduce confusion and streamline complaints.