A substantial fall in the state's unemployment rate to 5 per cent has sparked concern that WA is not ready for the next wave of growth, with a business lobby group projecting a shortfall of 150,000 workers within seven years.

A substantial fall in the state's unemployment rate to 5 per cent has sparked concern that WA is not ready for the next wave of growth, with a business lobby group projecting a shortfall of 150,000 workers within seven years.