[MargaretR]

Many MPs have other jobs as barristers and company executives.

To many of them, their MP pay is 'pocket money'.
To see how prevalent this is, look at the Register of Members Interests.

The majority don't need or earn the rise, since the 'second job' that it is , does not represent a full time job. On the contrary, many use their positions as elected MPs to promote/enhance their other financial interests (lobbying).

Whilst we have broached the topic of 'member's interests', it may well be useful to look at the reasons why some members here have opinions they do.

'Follow The Money' seems to apply, especially when the opinions are expressed by a former offshore banking exec, who spent decades helping the filthy rich avoid tax.