I also agree with you in terms of giving token sums to ensure
the day to day operations of the church etc. With a membership of a
few thousands, surely $10-$20 contribution every weekend per person
will suffice. 10% of your monthly salary of $2,000 is $200. More if
you earn more. What happens to the excess funds once operational
costs have been covered?
Again I stress, God doesn't need money. People do. 
Well, they need to set aside some $$ for contingency fund, love
offering to speakers who are invited to speak in the church and so
on.
The 10% tithing is what is stated in the bible in the book of
Malachi (christian, correct me if the spelling is
wrong). Personally, to me 10% is a lot. In
the past, when I was a christian I gave 10% for a couple of
times and thereafter did not find that I could afford this much to
give.