The Wikimedia Foundation does have a few dozen paid employees to maintain the servers, conduct community outreach, and provide legal counsel to the Foundation. However, the thousands people who write and edit Wikipedia's articles are all volunteers.
No.
Yes, the Community Assistants do get paid.
because of their hard work
Work ethics
according to wikipedia there r 1700 people working for it
No, because Wikipedia does not think, it does not make any decisions. Those who do, the people who work together to enhance Wikipedia, are the collective intelligence, and Wikipedia is their collective knowledge.
Yes, when people have jobs, they get paid for the work that they do.
you pay your taxes as soon as you get paid, this is for people who get paid with a wage or salary not someone you gets paid with a fee.
Demand
Money paid to people for regular work or services
The people who bought the paintings.
Such specialists are usually paid to do work for others. They may have signed a contract stating that the work they get paid to do doesn't belong to them; even if they didn't sign such a contract, it is usually implicit. For more information, read the Wikipedia article entitled "Work for hire".