There isn't enough money because big corporations don't pay taxes. Another is the official Luxembourg policy of crafting special tax deals to tempt big international companies to base themselves in Luxembourg. This is the idea and plan of the former Luxembourg Finance Minister and Prime Minister, Jean-Claude Junker, now President of the European Commission.
Unfortunately, the UK has a long history of being very bad at designing progressive tax systems, the class system in action to protect themselves from paying taxes. It's always the lowest paid who pay the highest amounts of taxes too, one of the main results of austerity policies. Mark Blyth, a Scottish economist at Brown University has written about this in Austerity: the History of a Dangerous Idea. This is the fourth time the world has tried austerity in the last 150 years, with the same results every time.
And, also unfortunately, Britain doesn't earn enough by its own efforts, it never has. We've never been very good at business and aren't productive enough. Management is largely awful, uneducated, inexperienced in the nuts and bolts of business but overflowing with MBA newspeak and theory. Joseph Stiglitz and Paul Krugman are experts at illustrating this.
I've run my own one-horse typesetting and design business, successfully as well as working in the railway industry for a lot of years (British Rail, InterCity Great Western, Railtrack), and have been appalled at the lackadaisical attitudes I've seen to investment, planning, project management, and paying one's bloody bills on time.
Our education system, that perennial political football, isn't fit for purpose and before you scream, no I'm not blaming the teachers at the coal face. I'm blaming that class system again, with its parochial attitudes that Britain is Great and all those foreigners know nothing. All children should have the opportunity to do three sciences and maths at school, or music and arts, or two (at least) foreign languages, whatever it is they need, to 'A' level, or the IBL, their choice, even if it means splitting school weeks between two separate schools, as happens a lot with musical education in other European countries. No chance. For these Tories investment means selling off the country's assets to their academy chums. Education isn't for profit, it's to produce rounded individuals with the skills and attitudes needed to make the best of themselves, to be thinking, decent, considerate, hopefully fulfilled, contributing individuals in society, and to be happy in their lives.
This is so depressing. I went to Uni in Germany, bachelors and doctorate. It's a different world out there, I've loved it ever since. People who know their history, the good and the bad, and know they aren't responsible for it so they're not in hock to it. Their industrial success is based on their education system; look at how many of their manufacturing and other successful companies have top managers who've come up from the shop floor of their industries and know it to their fingertips.
If you've read this far you deserve a medal.
Off soapbox, I'm just getting too depressed and I have work to do.