The way I see it, whatever the source of our money*, it is how it is distributed that affects our lives. In order to function, society needs goods and services - essentials such as food and transport systems, and luxuries such as TVs and - I don't know - hairdressers? People need to be paid to provide these goods and services, or we can buy them in from abroad, losing money from the economy. That is relatively easy, as people are taxed on the income they earn for providing them, which is taxed again when they buy or pay for the goods and services produced by others, which have resulted in the others' own income being taxed, so it's all about circulation. Round and round it goes.
Depending on the political will of the time, some groups earn more than others, and government policies mean that some pay less tax than others, and therefore those people can take money out of the economy and keep it in the bank (or under the mattress, or in offshore accounts to avoid being taxed on the interest). The extent to which this is allowed depends on the government of the day, but there is often little to choose between the options, as political philosophy has to be balanced with the pragmatics of getting voted in.
Then we have to sell our goods and services abroad, aiming to sell more than we buy. Losing trading partners in the EU, and faced with tariffs from the US hasn't put us in a great position, but it seems that talks and diplomacy are in place to try to make the best of that.
As well as all of that, we need to look after the old, the young, the sick and the poor - often described as 'economically inactive'. If there is more money circulating than being spent on this, life is good, as there is enough surplus to pay for their welfare. If, however, more of the surplus is in people's banks and not available for circulation, life is less good for those who rely on public services as they are cut back, and if fewer people are 'active' economically than 'inactive' we are in trouble.
As we have an ageing population, and have had many years when wages have been low (so for many people there is no financial incentive to work), and many people are sick and unable to work, that is the situation in which we find ourselves now. The benefit system makes things worse, as means-tests can mean that people are better off not working than working, particularly when rents and childcare are so expensive. The end result is that we have fewer workers paying tax, and fewer gods and services produced 'in-house'. The government is trying to rectify that, by increasing wages, directing public spending to where it is needed, making a start on a housebuilding programme, and by encouraging those who can work to do so. Obviously this can't happen overnight.
*but money must come from somewhere, as if it were really just a case of countries creating their own money why would people in Malawi (to use the above example) be struggling along on £2 a day, when all their government needed to do was print some for them?