I think that people who previously spent a lot on commuting and other work expenses, but have continued to work from home will have saved a lot. Everyone else will either have lost money or broken even, so I find the conspicuous consumption insensitive to say the least.
Anyone on a fixed income, such as a pension, who is not working will probably bump along much as before, apart from food going up (whether because of Brexit or Covid is difficult to tell). People who didn't travel far anyway are not going to save money on petrol/fares, and won't have cut back on expensive coffee and work clothes.
People who have been furloughed with have mixed fortunes. Some will offset the 20% loss against work expenses, but others who were just managing before will feel the loss.
It is the people who have been laid off or have lost their jobs who must be desperate now, and for them to hear that others are spending what would have been their holiday money on unnecessary carpets must be sickening for them. According to today's BBC business news, the worst is yet to come, and thousands of businesses are 'on the brink of bankruptcy'. When the subsidies stop, the government will want to claw back the money it has spent.
Yes, we live in an very unequal society, but usually British manners normally discourage talking about money. This sudden media interest in spending is very likely to be deliberate, so that the government has an excuse to do things like means test pensions, increase taxes and make spending cuts.