That is factually incorrect. The Netherlands is not phasing out open air transit (barriers are only a thing at the high-volume stations) and the barriers are rarely 2 meters tall (at most stations they are waist-high).
The "refugee bus line" is a single ferrying route between a rather awkwardly-placed arrival center and its nearest train station. The main issues were caused by refugees being unable or unwilling to pay the bus fare, and considering all of those refugees are living off an allowance anyways, having the arrival center itself pay for the buses and making them "free" really is a no-brainer solution.
The "refugee bus line" is a single ferrying route between a rather awkwardly-placed arrival center and its nearest train station. The main issues were caused by refugees being unable or unwilling to pay the bus fare, and considering all of those refugees are living off an allowance anyways, having the arrival center itself pay for the buses and making them "free" really is a no-brainer solution.