The Commission decides what MEPs vote on.
I know, it made a nice inflammatory soundbite to fool people with, didn't it. The reality is rather more complex.
Try reading this:
www.europarl.europa.eu/external/html/legislativeprocedure/default_en.htm
The European Commission prepares legislative proposals on its own initiative or at the request of other EU institutions or countries, or following a citizens' initiative, often after public consultations. The final proposal is forwarded simultaneously to the European Parliament, Council and national parliaments and, in some cases, to the Committee of the Regions and the Economic and Social Committee.
The ordinary procedure starts with the submission of a legislative proposal to the European Parliament and the Council.
The ordinary legislative procedure currently applies in 85 defined policy areas covering the majority of the EU's areas of competence
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The "right of initiative" lies with the European Commission. It is responsible for submitting most legislative proposals. However, Parliament and Council may ask the Commission to submit proposals and in a few well-defined cases other institutions may come up with proposals.
Parliament (by a majority of its component Members) may ask the Commission to submit a proposal in cases where Parliament thinks EU legislation is needed to help implement the Treaties. If the Commission refuses to submit a proposal, it has to give an explanation.
The Council (acting by a simple majority) may request the Commission to undertake any studies ministers consider desirable for the attainment of common objectives, and to submit to it any appropriate proposals
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In the following very specific cases, the Treaties allow the ordinary legislative procedure to be launched:
on the initiative of a quarter of the member states (judicial cooperation in criminal matters, police cooperation)
on a recommendation from the European Central Bank (certain articles of the Statute of the European System of Central Banks and of the European Central Bank)
at the request of the Court of Justice of the European Union (establishment of specialised courts attached to the General Court to hear and determine at first instance certain classes of action or proceeding brought in specific areas, certain provisions of the Statute of the Court of Justice of the European Union)
at the request of the European Investment Bank
A Commission proposal may also follow a European Citizens' Initiative.
The Commission's proposal is the result of an extensive consultation process, which may be conducted in various ways (an obligatory impact assessment, reports by experts, consultation of national experts, international organisations and/or non-governmental organisations, consultation via Green and White Papers etc.).
A consultation process is also launched among the different Commission departments in order to ensure that all aspects of the matter in question are taken into account (inter-service consultation).
The Commission's proposal is usually adopted by the College of Commissioners on the basis of either a written procedure (no discussion among Commissioners) or an oral procedure (the dossier is discussed by the College of Commissioners) and is published in the Official Journal of the European Union.
The Commission submits its legislative proposal (normally for a regulation, directive or a decision) to the European Parliament and the Council, but also to all EU national parliaments and, where applicable, to the Committee of the Regions and the Economic and Social Committee.
etc.