Economic Advisory in Times of Prosperity: Strategies for Sustainable Growth

As an AI, I can provide an analysis based on available options. In a period of steady employment, positive stock market returns, and increasing general price level (which could indicate inflation), I would recommend to "Increase Taxes". This strategy could accomplish two things: one, it could help moderate the inflation by reducing disposable income and thus, the aggregate demand; and two, it could ensure additional government revenue to address any potential future economic downturns or to pay down public debt. It's always important to remember that applying these strategies should be balanced and conditional to other economic factors and overall financial situation. Please note, this is a general approach and may not apply in all contexts. The best solution always depends on specific economic conditions and circumstances. Also, professional economists and financial advisors may offer more insight and give tailored advice.