"Most" people do not spend that on a holiday. Get in the real world.
You’re not the average though. Have a look at the statistics. Around a third of people in the UK spend £1-2k on their main annual holiday, plus spending money. Another third spend £2k plus. Some people have a second holiday as well. So you’re looking about half of people who could cut out their holidays without changing their lifestyle and that would cover the rise in energy bills.
Aside from the fact if all those people who do spend £4k on a holiday stop doing so, what happens to the leisure and tourism industry they were supporting?
Oh the leisure and tourism industry is going to die, there’s no doubt about that. Holidays are the first thing to get cut when finances are stretched. But for about half of people, cutting out holidays is the only thing they’ll need to do to make ends meet. So for those people life will continue pretty much as normal, minus holidays.
Maybe another 25% of people will also need to stop having days out and eating out, so hospitality will get hammered too. But not as much as tourism.
The main concern is the other 25% who already couldn’t afford holidays or restaurants, because they don’t have anything in their budget to cut. Those are the people who will default on their bills. And that 25% will swell to include all of the newly unemployed who lost their jobs in tourism and hospitality.
Ironically the extremely poor will probably be ok because the government is giving extra cash to benefits claimants.