Are they not teaching a works based salvation?

I have heard a number of people speak about the following:

Matthew 19:24 And again I say unto you, It is easier for a camel to go through the eye of a needle, than for a rich man to enter into the kingdom of God.

The speakers went on to say that Jesus was referring to an actual small hole in the wall in Jerusalem in his day.

That for the camel to get through the hole, he had to take everything off.

Then he had to get down low, and struggle to squeeze himself through the tight little hole in the wall.

That this, by comparison is a picture of how to be saved, and why some aren't saved.

But would that not be teaching a works based salvation?

We don't get saved by what we do, by what we strip off, and how hard we struggle to get in.

We don't get into heaven like a camel struggling to get through a hole in the wall.

Wasn't Jesus speaking about the complete impossibility of a camel going through an actual eye of a needle?

That it is that impossible for a rich man to be saved, unless Jesus, himself, does something?

Matthew 19:25 When his disciples heard it, they were exceedingly amazed, saying, Who then can be saved?

  26 But Jesus beheld them, and said unto them, With men this is impossible; but with God all things are possible.