You can see that in Germany, right now. They announce huge budget increases for this or that project and the money is allocated and just sits there because they can't find anyone to do the work they're trying to fund.
Allocate €5 billion to repair bridges and then realize you don't have anyone left, who knows how to repair bridges. So, you decide to shift the funds to updating the electrical grid or the train infrastructure, but you forgot to check if there are any available technicians. Woops. There aren't any. Welp, guess you can always invest in education, just need to dig up some teachers somewhere...
Do the math.
Nobody ever does the math.