Whatever you say, you cannot magic money out of thin air. Wealth is created through productivity, not through a printing press - you print money, then you borrow money so you consume things today and have to tighten your belt tomorrow.
The country is knackered at the moment, loads of people havent been working and havent paid taxes because they havent earned anything. The government has borrowed vast amounts of money, it cannot keep borrowing money - every time this has happened in the history of money (circa 5000 years) it has had the same consequences, so the modern monetary theory is a load of balls.
The government has tried to keep taxes low to keep the economy going, at the same time as it injects significant monetary stimulus into it. It has few financial levers it can use promote further growth - taxes were low, interest rates were already nearly zero.
The only ways the government has to create wealth (to pay for higher NHS salaries) is increasing productivity. There are a few ways to do this 1) Everyone works longer hours for the same amount of money 2) Upskill everyone into high demand occupations 3) Boost innovation and tip money into things like 5G and R&D.
Option 1 - is pretty much already happening for those who havent been furloughed. Option 2 - Is an ambition but moving slowly Option 3 - The government is trying to promote but is slowing down the roll out for years of 5G because people like Ian Duncan Smith dont like Huawei.
Unfortunately we dont have a magic money tree, even paying MPs zero wouldnt get the money required and the government has already started to go after Amazon and Google - and is working with foreign governments to do it (this is slow).