Travel can be extremely cheap nowadays, e.g. budget airlines on weekdays, last minute deals from the big tour operators. Working one 10 hour day a week will allow for way more travel than 4x the money on a 4 or 5 days work week.

Last year I had a consulting gig in a Europe based company, with offices next to a big airport. As summer was slow anyway I'd work 30h weeks (invoicing four 7.5 hour work days) Tuesday - Thursday, and spend the other 4 days at a beach in Ibiza, Bulgaria or Cape Verde (with occasional remote login to take care of emergencies).

Ah, sounds like no family, no kids and no house then?

I do have two houses. They are in cheap places and the total mortgage payments are what I make in 3 - 4 days.