<i>Therefore the marginal utility of time has a lower limit...</i><p>So what?<p>If we were to impose some cap on income (say $1B&#x2F;year) would it suddenly be &quot;exploitative&quot; to charge any income tax? If not, then this argument is a red herring.<p><i>Would you say that it is overall a value positive transaction?</i><p>Yes.<p>Of course, your analogy is silly - a better comparison would be a resort near the desert which charges $2.50 for a bottle of water. All anyone is proposing is that welfare people get a job that pays the same rates that the workers supporting them get paid.