How was supply side economics supposed to fix the economy?

Supply-side economics posits that reducing taxes and decreasing regulation will stimulate investment, increase production, and ultimately boost economic growth. By allowing businesses and individuals to retain more of their earnings, proponents argue that it encourages spending and investment, leading to job creation and higher overall economic output. The theory suggests that as the economy grows, tax revenues will eventually increase, offsetting the initial loss from tax cuts. This approach gained prominence during the Reagan administration in the 1980s, aiming to address stagnation and inflation.