That level of employment growth simply isn't sufficient to match the increase in Australia's working age population," he said.Mr Pickering said there were "certainly some cracks" appearing in the jobs market, but he was not convinced that they were enough to stop the RBA from hiking rates again."Inflation is simply too high and too broad-based to be ignored," he said.New data this week showed underlying inflation increased to 3.6 per cent in May, up from 3.4 per cent in April The RBA wants inflation sitting at 2.5 per cent.Another dataset on Thursday from the Bureau of Statistics showed the number of job vacancies declined by 2.1 per cent in the three months to May, the first drop in job vacancies since August last year."The decline in job vacancies was widespread, with falls across the public and private sectors as well as most states and industries," ABS head of labour statistics Sean Crick said.Job vacancies fell in seven of the eight states and territories over the three months to May, with Tasmania experiencing the only rise in vacancies at 1.4 per cent. The financial and insurance services industry had the largest quarterly percentage drop, with a fall of 21.4 per cent