But you are missing the point that even if student loans had gone up by inflation, your required parental contribution would have gone up too and would be more than it is now, and your child would still be struggling, NOT because of the amount of loan available, but because you are declining to top him up as per the required parental contribution.
I completely disagree with your assertion that the number of parents who have saved for uni is low. I know no-one who is on an income that will require a parental contribution who hasn't been thinking of this and tucking a little bit away since their children were born. Yes, it's a huge amount to find from day to day income, but it's not a big amount to save over nearly 2 decades.
The vast majority of students cope fine because the max loan amount is enough for all but the most expensive cities, and most students have the total loan amount to live off of because their parents have made provisions to top them up if they won't get the full loan. You keep talking about £27K - but you know you are being disingenuous there. At £27K family income, the top up would be minimal. If you need to make a significant top up, you have a high family income. Since you say you already give £300 a month, he's in the cheapest of the cheapest and he still has a deficit, I can only surmise that he gets minimum loan. So you have a high family income in excess of £62K. So you need to stop pleading poverty and that you couldn't possibly have saved any money for your child in the last two decades. Your child is struggling because of you, not because of the government.
This is the amount you are meant to contribute linked to earnings, and remember you've had 18+ years (mostly with ultra low mortgage rates) to prepare for this.
Household income Maintenance Loan Expected parental contribution
£25,000 or less £9,978 £0
£30,000 £9,265 £713
£35,000 £8,552 £1,426
£40,000 £7,839 £2,139
£45,000 £7,125 £2,853
£50,000 £6,412 £3,566
£55,000 £5,699 £4,279
£60,000 £4,986 £4,992
£62,343 or more £4,651 £5,327