Considering that the majority of the world dresses like they are headed to and from the gym (which they probably are -- another modern addiction), garden plonking steez seems like a step up and suggests an interest in something other than pumping iron/yoga/smoothies.
If he were actually in a garden, it would be unimpeachable. Probably he's on the grounds of some villa, so it's a bit silly, but nothing to get worked up about.
I don't want an Anna Wintour type world where everyone sashays around in three piece suits all the time. Do you?
It seems OK that a past-60 musician should be able to slap together reckless combos. Have you seen the "Hawaiian suit" combos that Charlemagne Palestine likes to wear? There is a man having fun.
If you can find a smoking gun that shows he was wearing Crocs with that oufit, then we have grounds for the TJ-Maxxian implications of it all. Otherwise, chillax...I think your tie knot may be blocking off oxygen flow to your creative faculties.