It may not be illegal but very unethical. He is serving as an MS and that is not setting an example.
There is a brother who used to be in my KH. He would always brag how he works around 20 hrs a week. His wife is a regular pioneer and they are always complaining about their money problems and "woe is me". They ended up getting food stamps and ate better than most in our KH. People would tell him to have his wife find a PT job, but he says "she works for Jehovah." I say Jehovah does not give her a paycheck. He is an MS she is a pioneer they both should be disqualified since they are not working (hard enough) to pay their bills and have to live off the government.