This is from Sotah 44a:
תנו רבנן אשר בנה אשר נטע אשר ארש לימדה תורה דרך ארץ שיבנה אדם בית ויטע כרם ואח”כ ישא אשה ואף שלמה אמר בחכמתו הכן בחוץ מלאכתך ועתדה בשדה לך אחר ובנית ביתך הכן בחוץ מלאכתך זה בית ועתדה בשדה לך זה כרם אחר ובנית ביתך זו אשה
It is a valid point that learning after marriage before engaging in parnosoh has its benefits. But the question to ask is whether this is the derech the Torah guides us to follow. The above excerpt from the gemora tells us clearly that this is NOT what to do. It does not say go to college, but it does clearly demand that parnosoh not be delayed or postponed.
It is said that this was posed to Rav Aharon Kotler ZT”L as a question when he was embarking on establishing the kollel concept in America. He responded that this was a הוראת שעה. Even Rav Aharon fully recognized that the Chazal were smarter than us, and that they did not believe in the current trend to ignore the fundamental responsibility of ואפרנס ליכי that is spelled out in the כתובה. Learning is always great, but it does not absolve anyone from the Torah obligation to support a family. And it is not the chiyuv of the community or the public to fund that desire to learn.
The same proponents for the filling of the kollel beis hamedrash have nothing to advise for the sufferers of the post kollel financial crisis. How do they assume the responsibility for placing yungerleit there?