Isn't there a minimum age to work in Sweden? According to this link, light work is 13 and I think Mc Donalds might be 16?
This would make the analogy really stupid.
http://www.right-to-education.org/country-node/526/country-minimum
When you work at Mc Donalds you get what you are promised your paycheck.
When you work for the Watchtower you just get more promises.