Who needs an ECA?
If you have a Canadian degree, diploma or certificate, you do not need to get an ECA.
You will need to get an ECA for your foreign degree, diploma or certificate if:
a.you want to be considered for the Federal Skilled Worker Program (FSWP) under Express Entry
•you are a principal applicant, and
•you got your education outside Canada, or
b.you are an Express Entry candidate (or their spouse or common-law partner coming with them to Canada) being considered for the Federal Skilled Trades Program or the Canadian Experience Class, and you want points for your foreign education.
[GUYS FROM THE ABOVE STATEMENT mentioned on the CIC website. It is very clear that for FSWP you do not need to get your spouse ECA.
I am not for FSWT or CANADIAN EXPERIENCE CLASS. I am for FSWP so I should NOT be worried about it. No use of getting it done for spouse because it is not mentioned that you get some additional points unless you are FSWT or Canadian Experience Class applicants.]
http://www.cic.gc.ca/english/immigrate/skilled/assessment.asp
