* NAB shares have lost over 20 pct since Royal Commission
inquiry
(Recasts, adds shares, shareholder comment):
SYDNEY (Reuters) - Shareholders voted against the executive remuneration plans of two of Australia’s biggest banks on Wednesday following misconduct revelations that have swept through the country’s financial sector. National Australia Bank (NAB.AX) shareholders delivered an unprecedented protest vote against the lender’s pay plans, with a record 88.1 percent opposing the executive bonuses presented to the annual general meeting in Melbourne.