I think the effects will be polarised.
Huge numbers of people won't have been financially affected at all, i.e. pensioners, benefit claimants, workers who've not been furloughed etc etc.
Furloughed workers may only have received 80% of their wage, but they'll have also paid less tax/NIC/pension/student loans and may have saved on commuting costs, so may not have been hit by 20% in their pocket.
Of course, at the other end of the scale, some people will have been absolutely knackered by covid. I.e. those made redundant or put on drastically reduced hours, the estimated 3 million self employed who fell through the support scheme cracks, etc.
But, I think overall, most people won't have been badly hit, if it all. Trouble is that is offset by the minority who have been so badly hit that they are losing their businesses, their homes, their savings, etc.