....... I fear we may be not far away from a markedly large increase in minimum wage costs. .....
I fear this too but I view it perhaps differently and less optimistically than you.
If the government continues to feed the population benefits which are hugely over the minimum amount they need to live on, repeat
NEED to live on, not the amount they minimally
WANT to live on, then the disincentive to work at near minimum wage levels will continue to erode.
However, raising pay levels won't solve this because the fact is there is a huge number of people claiming benefits at a level which is comfortable to live on who either have no intention to ever work or who supplement their benefits with undeclared earnings from somewhere.
I cooked yesterday, a pot of Japanese curry, which will feed 12 portions. The total cost for chicken breasts, carrots, potatoes, onions, peppers and the sauces was about £8. You can add rice from a 20kg sack I buy for virtually nothing per portion and it all freezes perfectly.
So we have 12 very good, well balanced and healthy meals for about £0.67 each and if you are unemployed or even if you are employed it is as simple as cutting up the vegetable and chicken and putting them into a large pot on the cooker. No major culinary skills required.
But Mrs Tax Credits and Mr UB40 will cash their giro, head for 20 Benson and Hedges and some bottles of Mega Bad Head Cider or something posher, a few scratch cards, some vape crap, another £20 on the mobile and head on down to the supermarket for a fridge full of ready meals costing £5+ each.
Then they will complain that their giro doesn't stretch enough despite having never paid any bloody tax in the first place.
So whilst the initial pressure will come from the workers demanding more, it is the layabout unemployed and even those working who claim benefits who we need to address. Until we do that, you cannot stop an upward spiral in wages until the customers won't pay the prices required to pay the salaries to keep ahead of the stupidly high benefits we give out.