Soon, the neocons were pushing the military budget skyward. And the Republicans on Capitol Hill who were supposed to cut spending exempted from the knife most of the domestic budget  entitlements, farm subsidies, education, water projects. But in the end it was a new cadre of ideological tax-cutters who killed the Republicans’ fiscal religion.

Through the 1984 election, the old guard earnestly tried to control the deficit, rolling back about 40 percent of the original Reagan tax cuts. But when, in the following years, the Federal Reserve chairman, Paul Volcker, finally crushed inflation, enabling a solid economic rebound, the new tax-cutters not only claimed victory for their supply-side strategy but hooked Republicans for good on the delusion that the economy will outgrow the deficit if plied with enough tax cuts.

By fiscal year 2009, the tax-cutters had reduced federal revenues to 15 percent of gross domestic product, lower than they had been since the 1940s. Then, after rarely vetoing a budget bill and engaging in two unfinanced foreign military adventures, George W. Bush surrendered on domestic spending cuts, too  signing into law $420 billion in non-defense appropriations, a 65 percent gain from the $260 billion he had inherited eight years earlier. Republicans thus joined the Democrats in a shameless embrace of a free-lunch fiscal policy.

The third ominous change in the American economy has been the vast, unproductive expansion of our financial sector. Here, Republicans have been oblivious to the grave danger of flooding financial markets with freely printed money and, at the same time, removing traditional restrictions on leverage and speculation. As a result, the combined assets of conventional banks and the so-called shadow banking system (including investment banks and finance companies) grew from a mere $500 billion in 1970 to $30 trillion by September 2008.

But the trillion-dollar conglomerates that inhabit this new financial world are not free enterprises. They are rather wards of the state, extracting billions from the economy with a lot of pointless speculation in stocks, bonds, commodities and derivatives. They could never have survived, much less thrived, if their deposits had not been government-guaranteed and if they hadn’t been able to obtain virtually free money from the Fed’s discount window to cover their bad bets.

The fourth destructive change has been the hollowing out of the larger American economy. Having lived beyond our means for decades by borrowing heavily from abroad, we have steadily sent jobs and production offshore. In the past decade, the number of high-value jobs in goods production and in service categories like trade, transportation, information technology and the professions has shrunk by 12 percent, to 68 million from 77 million. The only reason we have not experienced a severe reduction in nonfarm payrolls since 2000 is that there has been a gain in low-paying, often part-time positions in places like bars, hotels and nursing homes.

It is not surprising, then, that during the last bubble (from 2002 to 2006) the top 1 percent of Americans  paid mainly from the Wall Street casino  received two-thirds of the gain in national income, while the bottom 90 percent  mainly dependent on Main Street’s shrinking economy  got only 12 percent. This growing wealth gap is not the market’s fault. It’s the decaying fruit of bad economic policy.

The day of national reckoning has arrived. We will not have a conventional business recovery now, but rather a long hangover of debt liquidation and downsizing  as suggested by last week’s news that the national economy grew at an anemic annual rate of 2.4 percent in the second quarter. Under these circumstances, it’s a pity that the modern Republican Party offers the American people an irrelevant platform of recycled Keynesianism when the old approach  balanced budgets, sound money and financial discipline  is needed more than ever.