I'm a real estate valuer who worked in the Australian Taxation Office (ATO) and Commonwealth Bank of Australia (CBA) before co-founding Westlink Consulting, a real estate valuation practice. I discovered, by leaving publicly-generated land rents to be privately capitalised by banks and individuals into escalating land price bubbles, this generates repetitive recessions and financial depressions. We need a tax-switch: from wages, profits and commodities onto economic rents/unearned incomes, if we are to create prosperity and minimise excessive private debt.