97% or thereabouts of the money we use is electronic (the sort of thing used by your credit card).
If a government wants to pay for something it simply credits the relevant bank account. Money is created right there by keystrokes. (More correctly it credits the reserves of the bank involved which in turn credits the account of the customer. But discussion of the reserve banking system is a distraction for now).
The key point is that the money was not first raised by levying a tax. No-one can pay tax until the government creates the money with which to pay it. It is spend and tax not tax and spend. Money is created by keystrokes on a computer, (computers), which is under B. of E. control (which owned by the government).
Tax helps control inflation by removing money from the system. The government also requires we pay tax in its money (e.g. sterling) which creates a need for its money and ensures we are obliged to earn some to pay taxes with. In this way the government’s money is given value and we are obliged to work and thereby increase the wealth of the nation.
Where bonds are concerned, these can only be bought with money the government has already created. No-one else is allowed to create money (apart from banks making loans which must be repaid with interest). This money is money the government has spent (created) but not been returned in tax. This is called the deficit. Note that this deficit amounts to all the (non-loan) money in the economy which we have to use and to spend. No deficit, no money. Bonds are a secure investment which institutions and individuals can use but it is all money the government has already created. I think a chief merit of bonds is that they support the private pensions of many people. The rest is mostly welfare for bankers.
Essentially money represents a credit-debit relationship. An IOU if you like. The government promises to accept its money in payment of tax and you cash the IOU in when you pay tax. It is not needed to pay for stuff. The government can always make more money by keystrokes and it does so every day. We don’t so much pay people using the labour of workers, as ensure people are obliged to work if they are to earn the money that the government demands in tax.
I think these (from page 4 of the thread) are useful places to start exploring the topic.
https://modernmoneybasics.com/
https://www.youtube.com/watch?v=bHQCjFebIf8
Good on you for putting your money (ha) where your mouth is and trying to learn this stuff!