Ikea's founder, Ingvar Kamprad, is a billionaire ... but Kamprad is famously frugal; he flies economy class and eats the famous Swedish meatballs at Ikea, Express has noted.

Swedish business magnate Ingvar Kamprad has been at the helm of IKEA, one of the world's largest furniture stores and most beloved brands, for more than 70 years. With a net worth of $39.3 billion ...