The high tax only come into effect when earning exceed GBP23k or so. But generally, even up to GBP30k should not feel the high taxation. For family tends to benefit more e.g. child benefit for the 1st child is about GBP70/mth, also child tax credits of at least GBP50/mth or so. Depending on income, there are more benefits to claim.
Healthcare is provided for all. In Wales, even the prescription drugs are free. Dental care is subsidised for adults whereas children gets free treatment. Education is also free from nursery to Pre-U. University is still free in Scotland where a small fee for England/Wales.
Fresh graduates like engineers, accountant, etc. get between £20-25k, for non-London salary, typically. For that amount is about 20-25% tax which include state pensions. The take home pay is about £1.5k or so, after tax, I hope I estimated correctly. Comparing to Singapore graduate, it is also a £ to $.
For that amount, could own a car (not new) and even live in a nice share flat or small apartment. MacDonald's meal is about £4 whereas in Sg is $5+. Petrol is £1.10 per litre and in Sg is $2? You can eat a nice 2-3 course meal in a restaurant for £10-15 whereas in Sg is about $20-30? A pint of beer is about £2+ and in Sg is $5 or more.
I would think life is better off in the UK. Remember, you still get a state pension, free healthcare, company's private pension + private healthcare, etc.
When comes to work, there is hardly overtime. 5-day week is standard, infact some companies operate 4 or 4.5 day week as standard. You get more life here.