[rsynnott]

Lobbying is likely easier in a polarised two-party system where you really only have to swing a few people on the edges to deadlock things. The European Parliament has 6 large parties (>50 seats), and they're not particularly cohesive, so cases where the pre-ordained decision can be swayed by getting to this six people would be much rarer.

[Lutger]

That is likely true, though there is still extensive lobbying going on in the EU and within EU countries. It is just done in a different way, with different mechanics.