The country needs money to get it going again. As Maizie has said, taxation comes after money invested.
The UK is very much a country of ideas and small entrepreneurs. Although many people lost businesses as a result of covid and others decided to retire, maybe earlier than they had anticipated, closing their businesses, there will be others, younger people, coming along who want to start a business. There may also be people who have taken early retirement because they want to start up themselves.
Right now there are small shop owners who are closing their shops because of the spate of shop lifting. They cannot afford to lose their stock or to pay for security (from humans). They are also worried about their employees and, as we know, the police don't have the time or the manpower to deal with these thefts.
The UK has a history of excellence in the various arts, subjects which many schools have now dropped. I remember that in the 60s and 70s many graduates from the RCA worked as designers in the German car manufacturers. They also worked as designers in the European fashion houses and there are still many heading up long established couturiers.
Many big budget films are filmed in the UK studios, rather than America.
In order to facilitate all these enterprises the UK needs investment in the infrastructure and services. This has to come from somewhere.