Can you explain in more detail what you are getting from that graph. Where is the GDP figure on that graph?
the graph shows the national debt to GDP ratio. Vertical axis is GDP, the scale is 100% GDP, the horizontal axis is time, so you can see our borrowing against our ability to service the debt.
You can see that our borrowing levelled at around 30% of our GDP during the membership period 1975-2008 until the subprime mortgage crash of 2008.
The EU's treaties are fundamentally there to ensure stability, countries are limited in how much they can borrow (3% of GDP) albeit that they all cheat with creative accounting, like Greece when they wanted to build for the Olympics.
2008-2010, Labour borrowed some to bail out the banks but the real hit is since 2010 until now, all under conservative government because of their low tax policy. Despite their effort to impose austerity on public services, they run such a high budget deficit in order to maintain low taxation on the rich. Imagine if they had taken 5% more tax a year, we wouldn't be where we are now. Large budget deficit has long term consequences. Interest accumulates, next government has bigger interest bills and the cycle will continue unless the next government reverses it.
Again it reads like people are trying to avoid the obvious truth that if you run a trade deficit or overall financial deficit you will get poorer and end up with more debt if you try to maintain your living standards without an income to support it. People keep throwing up stupid theories like low tax being the cause when there is an inherent structural problem with the economy because its running a large financial deficit.
The structural deficit that you often hear talked about is very real, that is because we voted for conservatives' low tax policy. The facts are all there, if you want to look into this.
Imagine that Nigel Lawson did not abolish the 60% tax bracket for the top earners, corporation tax rate remains at 30%, there won't be any more generous tax free pension contribution up to £5 million a year (think how many people can use that perk) and a myriad of 'investment reliefs' that created a whole industry of tax avoidance.
That particular policy results in more people waiting for treatment and they can't work or worse, choose to go from working and paying taxes to not working and relying on welfare.
I can go on but you see the gist of what I am saying.