The Test of Abundance

In Dt 32 Moses lays out what will happen to Israel should they abandon God and entertain foreign gods. The descent in that passage begins with their extreme prosperity under God's blessing. That prosperity tempts them to look for a 'better deal' with the gods of the surrounding nations. In Mk 10, the rich young man asks what he lacks to inherit eternal life. Y'shua's answer, "Sell all you have and follow Me." is more than the young man can manage. The Bible does not teach poverty, so what's going on here?