Comment by holowoodman

Being the French, their tactics will rather be what it always has been: Not reduce their contribution, but vastly increase their received subsidies from the EU. That way, they can let the EU subsidize what they can no longer afford to pay for with their own money. The EU will go along with this because this is the accepted MO of France's EU contributions since forever, and increased spending towards France will increase the EU's overall budget and therefore importance. The only unhappy member states will be Germany and a few unimportant small payer states. But Germany has always gone along with those shenanigans, so no reason to think they won't happily open their wallet again...