I too would agree that the only poll that determines the government is the one on election day and we've seen that go one way or the other because of a few days propaganda (<3 the westminister system, so good).

I think it's mostly that:

a) very few people read any sort of long form analysis or really any news at all.

b) rich people are highly motivates to distribute propaganda against this budget and to downplay how rich they are

c) lots of people who are yolked wage-slave proles (almost all the population) don't understand how low down the economic ladder they are and aren't motivated to think about it since it's humilating in a culture that equated wealth with worth and worthiness.

d) shares are basically the only way you can (un)realistically dream of escaping your chains atm and "labour can tax you out of escaping" is easy propaganda for (b) to hit (c) with.