That quote made me feel old - I can remember watching it when originally aired. Tongue in cheek script but the financial firepower of Oxbridge still sets those two unis apart.
Taking University income - and remembering in terms of overall student numbers neither Oxford or Cambridge are particularly large, and certainly nowhere near the numbers of a UCL, Manchester, Nottingham and the like.
Oxbridge together for the latest year just published by HESA had an income of £5.4 billion; close to 12% of the university sector (based on the 130ish unis that appear in the league tables). The next four add slightly more than that but include UCL, Manchester and Edinburgh all with far bigger student numbers. The Oxbridge income exceeds the combined total of the 45 unis at the other end of the total income scale.
Oxbridge tuition fee income - nothing too exciting, though perhaps not surprisingly disproportionately larger relative to the size of its overall student body. The main difference is that whilst tuition fee income for the sector is just over 50% of total income, for Oxbridge it is 15-17%.
Funding body grants - about £435m, just over 7.5% of the sector total.
Research Grants & Income - £1.36 bn; almost 20% of the sector total. and higher than the combined total of the 70 at the other end of the scale
Other Income - £2.2 bn ; 28% of the sector total
Investment Income - £230m just under 28% of the sector total
Endowments and donations - £319m - 44% of the sector total
Not that any of those figures are of any great help for the rest of the sector.