He has no more lost control of the economy than the Chancellors from 1997 to 2010 did, Mikey. The plain fact is that the country spends more than it earns. This is true of individuals (on average) and of the government.
Unless and until the huge sums spent on worthless unproductive public sector jobs (no, not doctors and nurses), the large sums spent on "Overseas Aid", the ridiculous sums spent of Tax Credits and Housing Benefits, and the huige sums spent on State Pensions which have not been funded by the recipients are reduced drastically then this will continue to be so. It's not a Tory thing or a Labour thing. It is a UK thing. The UK is addicted to debt (both personal and national) and like all addictions it's hard to shake off.