Here's how Education Next phrased that question: (npr.org)
When Jesus said, «The poor will always be with you...» he sort of disproved the author's next myth in his next phrase «but me you will not always have,» referring to the fact that he would not be physically present in just a few months (though he would send the Holy Spirit). (religion.blogs.cnn.com)
The next phrase in Isaiah 61:2 talks about «the day of vengeance of our God.» (redeeminggod.com)