There isn't any reason the world cannot be fed during the current crisis. Do I need new clothes? Not really. Do the people who make and sew clothes need to be fed? Yes.
In WWII the US increased agricultural production in order to feed Britain and the Soviet Union. Despite very tight limits on non essential goods. Workers took their wages, paid off debts or them in the bank.
But there is!
The reason we can't consume as much in this crisis is that we don't produce as much, because a lot of people aren't working anymore.
Which suggests that most of what we need is produced by about 10% of the workforce and the rest is largely busy work.
The longer this goes on, the more that will become apparent.
Then the discussion starts about what the 90% have to do so the needed 10% do a full week to look after all of us rather than just stopping on Tuesday when they have made enough for themselves.
It's also none of our business what people choose to do with their life and money. If they want to waste it on frivolous things, that is their choice and privilege.