Wa alaykum salam,
Muslims must abide by the laws in the lands they are living in.
We respect all the laws of the UK or the USA or wherever else we live. This is as long as those laws do not prevent us from worshipping Allah and following our faith.
With regards to Social Benefit, as some of us are born in these countries and we are British or American citizens
it is our right. However, it is haram to abuse our Rights by lying or cheating the system. i.e. benefit fraud.
As Muslims we must be the most honourable, so we should work hard in all things and be the best. inshaAllah
There are some people who are extremists and are ignorant of Islam and they go around calling everything halal haram without any understanding, so we must be careful of those people.
Wasalam