I'm not a Tory, just thought I'd qualify that. I'm a centerist who would vote Liberal Democrat or Plaid Cymru. I think the Tories often protect the interests of the upper classes/faceless corporations too much, and I think Labour discourage aspiration and are woefully inept at doing their job in government.
That said, I don't think what the Tories are doing now is "populist". Cutting expenditure is clearly unpopular.
Also, you say we should borrow more money, well if we borrowed more, we'd have to pay a higher interest rate, and burden our children with even more unsustainable debt than our parents left us. Cutting the deficit and having a few years of austerity is the RIGHT and RESPONSIBLE thing to do for the country. Yes we should be going after the corporations, yes the HMRC should be re-shuffled (and be paid higher, we need the best accountants working for the government, not corporations), but that doesn't mean we should cut taxes and raise spending.
In a few years when we have a balanced budget then we can have a strategic spending review and re-assess where our money should go and spend more. Or more probably we'll vote in Labour who will, no doubt, end boom and bust.