I'm sorry you don't agree with me, Someguy. I always tagged you as a very sensible member
When I say that people don't know what it is like to have money troubles when in a different income bracket, I am serious.
First of all, different salary levels come in different tax brackets. The OP will be in the 40% marginal bracket. Add to this that she won't be in receipt of lucrative tax credits (which, frankly, baffle me). It is very easy for someone on, say, 20k, to think that someone on 80k earns 4x as much as them, but of course that is not the case at all, or even close.
Also, the nature of Mumsnet is that most members experience changes in their economic circumstances. The scenario of buying as much as you can afford when you are childless becomes very difficult when you have your first child.
I know that when we bought our first house, we did the 3.5x first income and 2.5x second income for our mortgage. We had a few childless years when we had increases, but when we had our first child our finances changed dramatically. We could just about afford the childcare with minimal maternity, but with each child, the situation got tighter.
We, as a society, do not deny parenthood to anyone. We allow those who are quite unfit to be parents, but expect those who have overextended themselves financially to wait until they are well into their thirties. And these are the parents who are likely to have the best parenting skills and unlikely to produce future asbos.
Anyway, I imagine that most of the preachers on this thread receive substantial tax credits, so it is very easy for them to get onto their soapbox. It would be interesting to see them if they stood on their own two feet.
The OP needs to be encouraged, not put down at every opportunity. It is not the past that is important, but the future. She can only start from where she is now. Cutting back on spending is scary, so the OP needs as much support as we can possibly give her.