How to finance higher defense spending?

Defence spending at the level demanded by Trump is not out of this world. On average, Germany spent 4% of its GDP on defence in the 1960s. Poland already achieves this ratio today.

But Poland's economy is growing by around 3% a year after adjusting for inflation, and Germany even reached 4.4% in the 1960s. This helps to increase defence spending. Because if GDP grows faster than consumer prices, civilian government (i.e. non military) spending can be increased in line with inflation and the remaining additional tax revenues can be used for national defence. This would be politically more feasible.

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