what benefits thou, people keep mentioning benefits but dont name them ,,
i dont know what benefits you can get, even if your wife comes to the uk and doesn't work ,, for tax credits. if your annual income is not above one of the following 'limits', you can probably get tax credits:

if you have one child it is £26,000
if you have two children it is £32,200
if you're single without children it is £13,000
if you’re in a couple without children it is £18,000

and for some benefits the more you earn the less you get.