The truth is you can print money and borrowing and buying bonds and skip the payments playing smart with the system but not for ever you can do that until critical point of inflation.

When you have reached to the point when inflation is high then you can not just print money but you need real value real assets commodities food agriculture products oil gas and all kind of this things what we need to use daily.
If you don't control those markets and you are out of them you either leave your nation and country business and leadership because you know all your society will collapse anyways because you can't print money and you don't have access to real things!

Last option: Everbody knows! You take your military and going to take those real things like oil gas..... question is also what can stop Europe to invade Qatar? There is no military defence the country is small and it would be good for example for france to control gas of Qatar and it could be done quite fast i assume in few days france will go in and invaded and done, If not Qatar but 100% sure Marcon will invade some nations If he stay on power there is no signs that he will step out so definately he is up to fight for his economic power and will use military because If he don't do that he don't have any of the resources to sustain this economy in france and Europe no there is no choise but to go hard ways.

For me look like QATAR easy target and nobody really going to help them i don't think USA will interupt france If they want to take Qatar over.

So anyways countries need real things like oil gas and those who got nothing will go and take it one way or another that's for sure.
That's even possible that they will invade russia that will be france jackpot definately oil and gas and all the other things