Never increase the lifestyle when experiencing an increase in salary this is always a problem for young people and also most people, and never buy expensive items whose value drops very quickly and their use is not too important because later we will sell it at a very cheap price because of necessity, and always be disciplined to save because there will be important things that require and money quickly.
We don't need to increase our lifestyle if our financial needs are not sufficient because following a lifestyle has no limits, so it's better to have a simple lifestyle but have savings for the future. So the most important thing is that we can live life without heavy burdens even though we are not destined to be rich in life.