I can understand someone who is unemployed and actively searching for a professional job to believe that, but I think that looks at the issue from a privileged position. No one is quitting their professional offices jobs just to be on unemployment, but I don't think the same can be said of lower income sh*t jobs.
Such a declarative statement of "no one" cannot be accurate because there is probably someone doing just that. Working a low wage job - maybe day labor - just long enough to qualify for benefits, then quitting and coasting until they have to work again.
It's possible, so how do you prevent it?
Even if you cut that in half that's still way more than $40/week.
And no, you're not paying federal income taxes on that low wage income.
Legally, ethically, or morally? In the history of the world, there are definitely people who've done this, though the smarter move is to take a holiday in East Asia like the Philippines or somewhere else super LCOL rather than Europe.
Last year I was vacationing in Sicily and I met a French girl who was doing just that: traveling Europe while collecting unemployment from her home country. I am in favor of generous unemployment welfare, but there should be controls in place.