Good question. You don't prove it, you sign it. The consulate has you sign a declaration that you won't do any paid work, in person or remote, and your application shows income that doesn't come from work, so a pension, savings, dividends, or rent. That's the "showing" part. And they do check: some consulates look at your LinkedIn, and at renewal Spain sees your tax filings. If any work income appears, the renewal possibility is gone.
Island life is too difficult in retirement.
In some ways it's harder, but I know plenty of people in retirement who make it work. Nothing is impossible :)
How exactly would one show he won't work?
Good question. You don't prove it, you sign it. The consulate has you sign a declaration that you won't do any paid work, in person or remote, and your application shows income that doesn't come from work, so a pension, savings, dividends, or rent. That's the "showing" part. And they do check: some consulates look at your LinkedIn, and at renewal Spain sees your tax filings. If any work income appears, the renewal possibility is gone.
Madeira by a long shot
Great place!
Phuket is a little hectic for my taste, but beautiful nevertheless. I mostly enjoy Koh Samui and Koh Phangan.