Yeah I also believe that, given us having many needs and desires.
Also I believe that the happiness will only start depending on your expectations.
We can really be happy if we get the word ***contentment***
A person might be unhappy with the things they have, but the truth is they are not only contented to what they have. Others might as well be contented even getting half of the things that person is having
So basically happiness really depends on a persons expectations, on his/her contentment in life