Fraction of gdp isn't a good metric because the US has a large GDP. It's like implying that a billionaire hasn't spent much on housing because they only bought a 100 million dollar house.
A better comparison would dollars per unemployed person.
Isn't it the other way around? Looking at fraction of GDP controls for size of the country, since large countries have more unemployed people because unemployment rates don't differ by orders of magnitude.
The unemployment rate in the US and Germany are very similar (4-5%), so Germany spends 7 times as much training per unemployed person.
A better comparison would dollars per unemployed person.