It definitely is an admission that we have failed with regards to lower incomes and we desperately need a living wage to replace the insufficient minimum wage. This increase in the minimum income to support a spousal visa is an admission that the previous amount was completely unliveable in parts of today’s UK.
I don’t believe it happens often, although I don’t have the numbers, that the system is exploited with fake marriage. From my experience, there are quite a lot of parts to the process that I would imagine being difficult to lie about. Opening the system up to allow all spouses entry without prejudice would absolutely mean it was abused though and while I am all for people bringing their foreign partners to the UK, relying on public money is not right. We simply cannot afford to support the influx of people - we’re failing the people that are already here! How can we manage to support more people that don’t meet these income requirements?