The question seems simple but really it is very complex and usually confusing. 

For example, one person might make $50,000 year and spend it all on new cars, lavishly partying, expensive clothes and eating at the best restaurants.  To his friends he appears to be very wealthy.  Another person who also makes $50,000 a year drives a six year old Hyundai, parties socially with friends in her home, buys her clothes from Ross, and eats out once or twice a week always splitting the bill. By appearances she is not wealthy.   Appearances can be deceiving.   

He probably has nothing in his savings, spending all he makes.  She might have $100,000 dollars in savings, CD’s and investments. 

This is not to suggest which has the better life style or who is the better person.   That is up to the individual to decide.  The above example is to illustrate how being wealthy is not easy to determine based upon appearances.