The downing of Malaysia Flight 17 casts new light on just how inept and decadent the United States and Europe have become.

Faced with Russia's annexation of Crimea and attempts to repeat in Eastern Ukraine, the best Western Europe and the United States have mustered are strong words and token sanctions on top Russian officials and several companies. That's hardly enough to deter Russian President Vladimir Putin's ambitions to make Russia the dominant power in Eurasia.

Now, public outrage at the downing of the Malaysia Airlines passenger plane will force Western governments to exercise restraint from imposing truly effective sanctions on Russia's subversive activities in Ukraine in exchange for an international investigation.

That likely will yield little more than already inferred. Russia supplied the missiles and is culpable for enabling separatists who shot down the plane.

Not much else will happen.

Six months from now Russian agents will still be operating in Ukraine and planning similar uprisings in other former Soviet states.

The United States lacks sufficient military assets in Europe to deter Russian aggression, and Europe's most powerful state, Germany, lacks the will to stand up to Russia. U.S. President Barack Obama has been too successful at paying for entitlements by cutting the defense budget, and German businesses are profiting too much from commerce with Russia.

Obama naively misjudged Putin. There is no reset button for relations with a regime led by a criminal. Putin has plundered businesses, crushed dissent and killed journalists. To believe he can be persuaded through diplomacy or imposing minor economic costs is a fool's journey.

Putin knows if he unwinds his plans slowly and occasionally appears to engage in meaningful discussions and cooperation, he can dupe Obama and German Chancellor Angela Merkel and co-opt their political constituencies. The latter have already rationalized Russia's annexation of Crimea and will do the same if he slices off more of Ukraine.

The U.S. and European economies have grown so slowly in recent decades that their governments cannot afford both the militaries needed to deter Russian aggression and maintain their welfare states. And voters have been so lulled into complacency with high-minded talk about international law and diplomacy that they believe they can turn their eyes away from Russian state terrorism without peril to their own security, much in the manner of Munich and Neville Chamberlain.

Rearming could not be accomplished simply by taxing the wealthy and big corporations as liberals in America and Social Democrats in Europe would demand. Entrepreneurs and multinationals would find ways to locate even more investment and taxable assets in fast-growing Asia.

Rather, ordinary Europeans and Americans must be willing to pay higher taxes or accept fewer social benefits to secure Europe from Russian aggression.

That's the rub. Voters in Western nations simply won't accept that they cannot have effective foreign policies and be secure without strong, growing economies to pay for militaries to deter aggression and to persuade the developing world to their democratic way of thinking.

China's strong growth is permitting it to build a modern navy that challenges U.S. dominance in the Pacific, and extend its influence in the developing world by building mutually profitable trading relationships and with foreign aid.

More importantly, the contrast between Chinese economic performance and tepid growth in Western economies make its autocratic political system and state-managed capitalism an attractive alternative to Western democratic capitalism. Eventually, the West will be eclipsed, isolated and unable to defend itself and its liberties.

Most Americans and Europeans, for now, are reasonably prosperous, and believe they can accept slower growth as the price for maintaining massive welfare states, whose taxes and benefits discourage investment and hard work.

What they are unwilling to recognize is that their welfare states and consequent slow growth will ultimately undermine their security and survival.

Peter Morici is an economist and professor at the Smith School of Business, University of Maryland, and a national columnist, and tweets @PMorici1