Any expenditure by a public company to influence public opinion on matters not related to the company’s products or services that has not been approved by a majority of the votes cast by shareholders to approve or disapprove such expenditure shall be considered a breach of a fiduciary duty of the officers and directors who authorized such an expenditure. The officers and directors who authorize such an expenditure without first obtaining such approval of shareholders shall be jointly and severally liable in any action brought in any court of competent jurisdiction to any shareholder or class of shareholders for the amount of such expenditure.