There is some confusion about exactly what the government's draft bill on prisoner voting will contain on Thursday. What there is no confusion about, however, is that our MPs are strongly opposed to any move to extend the franchise to inmates. In February last year, they voted by a majority of 212 (with only 22 against) to retain the current ban.

There are some who say it is foolish for our politicians to behave in this way as it will result in a confrontation with the European Court of Human Rights. That argument does not cut much ice with me. I don't think we should legislate on this because Europe is telling us to. We should legislate on it because we are a liberal democracy.

When people are locked up for crimes in this country they already have lots of things taken away from them. Their liberty. Their right to see their family and friends whenever they please. Usually their job and their home. Their basic choices about what to eat, when to eat, where to eat and so on. It is right to deprive those who have committed crimes serious enough to warrant a jail sentence of these things. But why should they should automatically have their right to vote removed too?

I can see the argument for not allowing long-term prisoners and those with life sentences the vote. But the majority of prisoners are serving short sentences and, at the time of any general election, most of them will be released before any subsequent election and hence will be affected as a free citizen by the government elected. In the case of referenda, which tend to come around very infrequently, those results could affect the prisoner for the rest of their life. Someone only a few months away from release in May 2011 will be now out and yet may never get the chance to vote on the electoral system used for the House of Commons.

Perhaps even more importantly, one thing that almost everyone across the political spectrum agrees on is that we need to reduce reoffending rates, which in 2011 were running at an astonishing 90 per cent for serious crime.

Giving prisoners the vote will not change this overnight. But treating them with a little bit more respect and giving them a stake in how their society is governed is likely to be one of the things that helps. If we want to reduce recidivism, we need to be willing to think outside the constricted box our politicians have placed themselves in on this issue. A good start would be for the government to acknowledge on Thursday that there is a strong, principled case for some prisoners to have their democratic rights restored.

Not because Europe has told us to, but because it is right.

Mark Thompson is a political blogger, commentator and Lib Dem activist, who edits the award winning Mark Thompson's Blog and is on Twitter @MarkReckons.