It's OK. The reason some might hesitate is that visa officers have be known to be suspicious when an applicant sends money to the sponsor - because it might look like the applicant is paying someone to sponsor them. In your case it probably does not look like that, since you are both from the same culture, and you are the man sending money to his wife.
In any case, if the sponsor had no income, you would have to explain somehow how you two would survive without welfare. Stating the income of the applicant, and his or her financial assets, is the usual way to do this.
