Trade unionists from the public transport sector wave national flags during a protest calling for an increase in wages, in front of Victoria palace, Romania's government headquarters, in Bucharest September 18, 2013. REUTERS/Bogdan Cristel In 1974, the American economist Arthur Laffer, then a professor at the University of Chicago, was having dinner with his friend Jude Wanniski, an associate editor of The Wall Street Journal.

They were joined by Donald Rumsfeld and Dick Cheney, both of whom worked at the time in the Gerald Ford administration. The topic at hand was Ford's Whip Inflation Now, or WIN, initiative, which included proposed tax increases.

According to Wanniski's version of the story, which he recounted years later in a Journal article, Art grabbed a napkin and sketched out what Wanniski dubbed "the Laffer curve."

Put simply, the Laffer curve illustrates what happens when the government raises taxes too much — theoretically, it ends up bringing in less revenue than before the tax hike. Why? Taxpayers feel less incentivized to work if everything they earn is handed over to the government. Small businesses can no longer compete. The flow of capital is squeezed, and business growth slows to a trickle.

The Laffer curve says tax revenue at both 0% and 100% is the same: zero. But somewhere in between those two values is the "optimal" tax rate, one that maximizes both government revenue as well as employment, productivity, and output. (In the chart above, it looks as if 50% is the ideal rate, but the peak could fall anywhere. In fact, it varies year-to-year.)

Art is known today for being the architect of President Reagan's supply-side economics policies, which emphasize free trade, spending restraint, fewer regulations, and low taxes. According to the Laffer Center, these policies "contributed to the longest boom in United States history." More wealth was created between 1982 and 2007 than in the previous 200 years, when adjusted for inflation.

These are policies that apply overseas as well. Part of why the UK voted to leave the European Union last month was to escape punitive taxes and regulations — indirect taxes — imposed by unelected officials in Brussels. British voters recognize the fact that policies of envy have stifled growth and innovation.

Romania slashes taxes, and speedy growth ensues

Another country that "gets it" is Romania, the mountainous Central European nation that is home to roughly 20 million people. After years of tepid growth, Romania's government moved to revise its tax code. At the end of last year, it reduced the value-added-tax rate to 20% from 24%, lowered the income-withholding tax rate, nixed a controversial "special construction" tax, simplified deductibles, and exempted certain dividends from corporate income tax.

The changes have worked much faster than expected.

In the first quarter, Romania grew 4.3% year-over-year, beating the 3.9% that analysts had expected and up 1.6% from the fourth quarter of 2015. This places the country among the fastest-growing EU economies, with the European Commission now expecting it to be the second-fastest-growing country in the 28-member bloc behind only Ireland.

What's more, the investment bank Wood & Company sees country gross domestic product growing 5.1% this year and 5.8% in 2017. Much of this growth, Wood writes, will be driven not just by tax cuts but also by low borrowing costs, restructured balance sheets, and loose fiscal policy. Private consumption is healthy, and investor confidence is up.

The country is also getting back to work. Romania's unemployment rate in May fell to 6.6%, compared with 10.1% on average for eurozone countries. Its youth-unemployment rate, while worrisome at 21%, still significantly trails levels found in several other EU countries, including Italy (36.9%), Spain (43.9%) and Greece (47.4%).

A tailwind for Romania's tech industry

This is good news for Romania's economy as a whole, specifically Bucharest's important information-technology sector, which has grown tremendously in recent years. IT contributed 6.1% to the country's GDP in the first quarter and is expected to exceed 10% this year or next.

For years, Romania has promoted itself as a place to find reasonably priced software development by coders who speak English. Today, many of the world's top tech companies, including Adobe, Microsoft, IBM, Intel, and Oracle, operate in Bucharest, where consumer prices are dramatically lower than in London. (Rent is 84% cheaper in the Romanian capital than in the UK capital.)

In a previous post, I asked the question: Where's Europe's answer to Silicon Valley? Romania is the likeliest answer.

I have also been asking for months how Europe can jump-start its economy, and again, Romania might very well have the answer. It all comes back to the Laffer curve. Since the financial crisis, we have relied too heavily on monetary policy to accelerate growth. But quantitative easing, helicopter money, and negative rates have done all they can. Punitive taxes and burdensome regulation continue to hinder growth. It is time we follow Romania's lead and shift our focus to reforming our fiscal policies.