On the positive side, as a result of buying new things, many factors should work more to increase their production. Since, factories grow up their outcomes, it has positive effects on job opportunities and reduce rate of unemployment. So it is a good way to decline the crime rate. Moreover, people who addicted to consumerism should encourage companies to find new ways in fashion and technology. So it brings innovations and inventions whit it. Furthermore, companies have more competition with each other to find, build and or design new things. It must be more desirable.
On the negative sides, firstly, people who passionate about fashion and technology have to pay most of their income in that way for each month, so it put high pressure to budget of family. In addition, being on fashion leads to budget deficit at the end of month. Also it has diverse effect on health of society. secondly, nowadays the wide spread use of high tech gadget like cellphone, iPad and laptop cause to much trashes and most of that are unable to recycle. Thus, it has negative effects on environment. Likewise, more consumption might cause to more leavings and most of that are useful but they might not be up-to-date.
To sum up, consumerism has both merits and demerits, but the cons definitely more than the pros. 
On the  
positive
 side,  
as a result
 of buying new things,  
many
 factors should work more to increase their production. Since, factories grow up their outcomes, it has  
positive
 effects on job opportunities and  
reduce
 rate of unemployment.  
So
 it is a  
good
 way to decline the crime rate.  
Moreover
,  
people
 who addicted to consumerism should encourage  
companies
 to find new ways in fashion and technology.  
So
 it brings innovations and inventions whit it.  
Furthermore
,  
companies
 have more competition with each other to find, build and or design new things. It  
must
 be more desirable.
On the  
negative
 sides,  
firstly
,  
people
 who passionate about fashion and technology  
have to
 pay most of their income in that way for each month,  
so
 it put high pressure to budget of family.  
In addition
, being on fashion leads to budget deficit at the  
end
 of month.  
Also
 it has diverse effect on health of society.  
secondly
, nowadays the wide spread  
use
 of high tech gadget like cellphone, iPad and laptop cause  
to
  much
 trashes and most of that are unable to recycle.  
Thus
, it has  
negative
 effects on environment.  
Likewise
, more consumption might cause to more leavings and most of that are useful  
but
 they might not be up-to-date.
To sum up, consumerism has both merits and demerits,  
but
 the cons definitely more than the pros.