It's because the whole world became so connected and most big corporations have a global supply chain. The manufacturing and production of most goods happens in different countries then where the products are being sold. And between all those countries you have a huge logistic industry that relies heavily on cheap fuel and energy. Let's say a company buys cheap material around the world that will be shipped to country A for production and then shipped to country B to be sold. If now food prices rise globally, the workers in country A will ask for a higher salary which will lead to higher cost for the product. On top of that are fuel prices rising and making the transport more expensive. This means that in country B not only fuel and food prices are rising, but also all the products produces in country A. So the salaries in countries B have to rise even higher. It's a spiral that keep spinning globally and it's hard to stop.