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.
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.
