SYDNEY (Reuters) -A measure of Australian consumer sentiment eased back from 3-1/2-year highs in September as concerns about the economic outlook overshadowed a continued improvement in family finances, a survey showed on Tuesday. A Westpac-Melbourne Institute survey showed its main index of consumer sentiment fell 3.1% to 95.4, having jumped 5.7% in August to its highest since early 2022. The reading under 100 means pessimists still outnumber optimists. "Outright optimism remains elusive for Australian ...