The beatitudes

Luke
Have you read Luke's version of the beatitudes (see chapter 6 verse 20-26)?  His are far less 'spiritualized' than the ones quoted in Matthew 5.  For example, Luke only says blessed are you who are poor, for yours is the kingdom of God.  Matthew however, says blessed are you who are poor in spirit....
I looked up a couple commentaries, and they don't comment on the non-spiritual seeming aspect of Luke.  Are we supposed to readily see that Luke actually means poor (humble in spirit), because on the surface of things, it appears to mean that those who are physically/economically poor, they have the kingdom of God.  Feel free to weigh in on this conversation!