it is his business but in Islam we are not suppose to be excessive and show our wealth like this way. it is not about if we are jealos of it. our Prophet Mohammad peace be on him told us many stories of the rich muslim who were very humble and a caliph who walked while his servant rode the camel and when they entereed a town the people were surprise to see his humble to his servant. this is a big show off and there are to many poor ones in our country.