Id expect to see pages and pages of stats to back up your claim. And yes, you very much got wealthy off of much poorer people than you. Your 2012 not 1812 is very good, although it should be me using it not you.
For example you mentioned you work in sales... was it the queen you were selling to or something ? now as its 2012 and not 1812, im guessing not. I think you mentioned you sell some sort of IT service or training courses (if not, lets just use it as an example)... you sell to companies looking to train employees, they are looking to train employees because they are taking on new people or creating new systems, the new employees or systems are the result of masses of people (so a big % are basic tax payers) wanting to buy a product or service from this company. Now personally, I see paying more tax as a result of this no problem. This 10% of people that you keep going on about as if they are owed something, no they are lucky to be in this position. Tax the lower paid people more if you want... and watch your salary dry up through the lack of sales as the very bottom of the chain cant afford the initial service/product.
As a higher rate tax payer (im not sure if im in the top 10% or not, never looked at the figures) I'm perfectly happy with the system and know that were it to be changed so more tax paid by the 90%, chances are I'd drop out of the higher rate tax payer bracket. The top 10% shouldnt be concerned with the fact they are paying most tax, but be concerned that the system that allows them to be in the top 10% stays the same.
Oh and just to add, a lot of that 10% are probably wealthy due to the overspending of the government or borrowing of money from banks. Moan about the debt, but its probably a major part of the reason you are wealthy.