Bernard Arnault, the billionaire boss of the world's biggest luxury conglomerate LVMH, has picked a fight with the French government by suggesting that companies could flee France for the United States to escape a planned tax hike. As the government of Prime Minister Francois Bayrou is struggling to fine-tune a budget designed to tackle the country's deficits and debt mountain, Arnault took issue with an expected key ingredient, a special tax on large companies. "I have just returned from the US, and I have witnessed the wind of optimism in that country. Coming back to France is a bit like...