How close was Germany from being completely unrecoverable economically following WW2?

The economy is, fundamentally, built on the backs of people. If there is no people, there is no economy.

Germany was quite badly hit in the war. Something close to 10% of its entire population perished. Percentage wise, only the Soviet Union and Poland suffered equally serious losses.

This meant that, after the war, there must have been an enormous shortage of young men to work the factories, etc. Not to mention skilled workers and experts being killed/maimed/in captivity in Siberia/etc. Thankfully(?), the influx of refugees from Eastern Europe due to the expulsion of Germans seems to have somewhat helped the situation.

But assuming the influx of refugees just doesn't happen (perhaps the USSR intentionally forbade them from leaving in an attempt to collapse the German economy? IDK), was Germany nearing unrecoverable status? Basically, how much young men do you need in a population, percentage wise, to get a war torn country like that back on track?

Many countries that struggled for years to get back on track following WW2, such as Poland, the Philippines, had perhaps not coincidentally also lost rather large chunks of their young men in war with no way to refill such losses. Poland being something of an extreme case.